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Postfix: SMTP smuggling, remote crash, and hardening fixes in 3.11.7 and related legacy releases

Postfix 3.11.7 and legacy releases 3.10.14 and 3.9.15 fix SMTP smuggling, remote crash, and hardening issues.

Wietse Venema announced the Postfix stable release 3.11.7 alongside legacy releases 3.10.14 and 3.9.15. The releases fix SMTP smuggling, a remote crash vulnerability, and include hardening changes in the widely used mail transfer agent. Administrators running Postfix are advised to update to the patched versions.

oss-securitySep 10, 01:09 UTC · 7d agoVulnerability

CVE-2026-82561: Apache NiFi: Missing Authorization for Components Referenced in Flow Update Methods

Apache NiFi 1.5.0-2.11.0 flow update REST methods lack authorization checks for referenced components, permitting unauthorized Process Group flow replacement (CVE-2026-82561).

Apache NiFi 1.5.0 through 2.11.0 expose REST API methods that replace the entire contents of a Process Group with a client-supplied flow definition, including versioned flow update and rebase operations. Framework authorization for these methods was limited to read and write privileges on the target Process Group, without checking components referenced in the flow (CVE-2026-82561). No severity rating was provided in the disclosure; the affected version range is broad.

oss-securitySep 16, 15:17 UTC · 19h agoVulnerability 4 sources CVE-2026-825611

Flextype v1.0.0-alpha.3 Stored Expression Injection Enables PHP Remote Code Execution

Flextype CMS v1.0.0-alpha.3 stored expression injection exposes the mutable registry object, enabling stored PHP remote code execution.

Flextype CMS v1.0.0-alpha.3 evaluates attacker-controlled entry fields as expressions during entry retrieval when global expression processing is enabled. The expression environment exposes the application's mutable registry() object, which attackers can manipulate. Combined with the PHP entry directive, this enables stored PHP remote code execution from crafted entry content. The flaw was disclosed on the Full Disclosure mailing list on September 3, 2026.

Full DisclosureSep 4, 00:13 UTC · 13d agoVulnerability 8 sources

CVE-2026-86304: MojoX::Authentication versions before 0.006 for Perl allow SAML authentication bypass because parse_assertion builds Net::SAML2::Binding::POST without a trust anchor

MojoX::Authentication before 0.006 for Perl allows SAML authentication bypass because parse_assertion builds Net::SAML2::Binding::POST without a trust anchor (CVE-2026-86304).

CVE-2026-86304 affects MojoX::Authentication versions before 0.006 for Perl. The parse_assertion function builds Net::SAML2::Binding::POST without a trust anchor, so SAML assertions are not validated against a trusted signing key, enabling authentication bypass. The flaw is fixed in version 0.006 of the module.

oss-securitySep 6, 23:14 UTC · 10d agoVulnerability CVE-2026-86304

Metasploit Wrap Up: Lot of summer shells and fit http profiles

Metasploit 6.5 ships 13 new modules including RCEs for SonicWall SMA1000, Ghost CMS, Joomla JCE and Langflow, plus a Linux kernel LPE.

Rapid7's Metasploit wrap-up covers the 6.5 release, which adds 13 new modules, including remote code execution exploits for WordPress WP2Shell, Ghost CMS, Joomla JCE, Langflow, OpenCATS, Pterodactyl Panel, SonicWall SMA1000, Ray Dashboard and a Pix-for-WooCommerce plugin. The Fragnesia Linux kernel local privilege escalation (CVE-2026-46300) also landed. The release introduces HTTP malleable profiles, MCP functionality, Linux multi-fetch payloads and improved Windows on ARM support.

Rapid7 BlogAug 14, 21:27 UTC · Aug 14, 2026Tools CVE-2026-46300

Scans for Proxmox Servers, (Wed, Sep 9th)

SANS observed increased scanning and brute-force attacks on port 8006 targeting unsupported Proxmox VE 7 servers after a recent vulnerability advisory.

SANS Internet Storm Center reported a bump in scans for port 8006 and additional brute-force traffic against Proxmox VE servers following a Proxmox advisory about a vulnerability in older releases. The flaw only affects Proxmox VE version 7, which has been unsupported for a couple of years. Observed activity includes POST requests to /api2/json/access/ticket with root@pam usernames and weak passwords, fingerprinting requests, and POSTs to /api2/extjs/access/ticket; failed logins return 401 status codes and non-TLS POSTs return 308 redirects.

SANS Internet Storm CenterSep 9, 17:46 UTC · 7d agoExploit / PoC

Update modules/auxiliary/scanner/http/elasticsearch_tika_xfa_xxe.rb

Rapid7 updated a Metasploit auxiliary scanner module that detects XML external entity injection in Elasticsearch via Apache Tika.

A commit in the Metasploit Framework updated modules/auxiliary/scanner/http/elasticsearch_tika_xfa_xxe.rb, an auxiliary scanner module. The module targets XML external entity (XXE) injection in Elasticsearch through Apache Tika, and was co-authored by jheysel-r7. The terse commit message contains no additional details, CVE references, or exploitation notes.

Metasploit Framework commitsSep 8, 19:22 UTC · 8d agoTools

Vulnerabilities fixed in libxml2-2.15.4

libxml2 2.15.4 fixes an out-of-bounds read in xmlregexp's NXT macro plus several integer overflow and parsing flaws.

libxml2 2.15.4 (released September 1, 2026) includes security fixes: an out-of-bounds read in the xmlregexp NXT macro, missing overflow checks in dict.c, uri.c, and valid.c, an integer overflow in xmlIO before the writecallback, and an overflow check in xmlXPtrEvalXPtrPart. The release also propagates parseFlags in xmlXIncludeProcess and xmlXIncludeProcessTree. No CVE identifiers, exploitation, or severity ratings are given in the announcement.

oss-securitySep 4, 21:23 UTC · 12d agoVulnerability

Scans Targeting Hospitality Applications, (Wed, Sep 16th)

Scans from a bulletproof-hosting IP target the abandoned PIAF-HMS hospitality application, which contains numerous unpatched SQL injection flaws.

SANS ISC observed requests for /PIAF-HMS/ using the unusual user-agent Farez-Sorter/1.0, along with paths like /admin/, /ucp/, /hms/, and /hotel/, starting September 15 from the single source IP 94.102.49.125 (IP Volume, AS202425, a bulletproof hoster). PIAF-HMS, a PBX in a Flash Hospitality Management System, was last updated 10 years ago and a SQL injection vulnerability was reported recently; the code shows many injection flaws and lacks authentication and access control. The handler notes hotels are soft targets for personal data theft and guest MitM attacks, and asks for community insight on the campaign.

SANS Internet Storm CenterSep 16, 18:44 UTC · 16h agoExploit / PoC

Metasploit Wrap Up: Payloads and Exploits, and Scanners, Oh my!

Rapid7's weekly Metasploit roundup highlights newly added exploit modules, payloads, and scanners in the Metasploit Framework.

Rapid7 published its weekly Metasploit Wrap Up summarizing community contributions to the Metasploit Framework, including new exploit modules, payloads, and scanners. No article text was available; the post serves as a routine digest for practitioners tracking newly packaged modules.

Rapid7 BlogAug 28, 14:57 UTC · 19d agoTools

'TerminalFix' Campaign Weaponizes PowerShell for Enterprise Attacks

A ClickFix-style campaign called TerminalFix weaponizes PowerShell and reverse tunnels to infiltrate enterprise networks in a multistage attack chain.

Dark Reading reports on the TerminalFix campaign, a sophisticated multistage attack targeting enterprises. It uses a ClickFix-style social engineering lure and heavily weaponizes PowerShell. The chain establishes reverse tunnels into victim organizations' networks, giving operators interactive access for follow-on activity.

Dark ReadingAug 31, 20:25 UTC · 16d agoThreat actor in the wild

get the module working against several of the 12.4.3 versions

A Metasploit Framework exploit module was updated to work reliably against several 12.4.3 software versions.

A commit to the Rapid7 Metasploit Framework repository adjusts an existing exploit module so it functions against several 12.4.3 version targets. The change is described as getting the module working against those versions, indicating reliability or compatibility improvements. The commit text does not describe a new vulnerability, exploitation campaign, or affected victims.

Metasploit Framework commitsSep 9, 11:10 UTC · 7d agoTools1

add a DefangedMode advanced options as teh exploit modifies the targe…

A Metasploit Framework commit adds a DefangedMode advanced option to an exploit module that modifies the target host configuration.

The commit introduces a DefangedMode advanced option so that the exploit's modification of the target configuration runs only explicitly, making the behavior visible to the user. No target product, affected software, or CVE identifier is named in the commit message.

Metasploit Framework commitsSep 2, 09:28 UTC · 15d agoExploit / PoC1

Attack hides malware in PNGs and drops custom reverse tunnel on victims' machines

A ClickFix social engineering wave delivers a multi-stage attack that hides malware in PNG files and installs a custom reverse tunnel.

The Register reports a new wave of ClickFix social engineering attacks that trigger a multi-stage infection chain on victim machines. The attack reportedly conceals malware inside PNG image files and deploys a custom reverse tunnel tool for attacker access. Further technical details are limited in the available text.

The Register · SecurityAug 31, 18:26 UTC · 16d agoMalware in the wild

From 88 lines to 1: Detecting DLL hijacking with Elastic Defend

Elastic condenses 88 lines of detection logic into one Elastic Defend 9.5.0 rule catching the DLL hijacking used by a ClickFix campaign.

The ClickFix campaign side-loads a malicious mscoree.dll next to a signed Microsoft binary and also ships a driver to kill Elastic Endpoint. Elastic rebuilt the DLL as a NativeAOT library, dropped it beside the signed binary, and confirmed that Elastic Defend 9.5.0 flags the load. The post replaces 88 lines of detection logic with a single rule for DLL search-order hijacking.

Elastic Security LabsAug 28, 00:00 UTC · 20d agoTools in the wild

USN-8736-2: Perl vulnerabilities

Ubuntu issued USN-8736-2 fixing two Perl regex flaws that could cause out-of-bounds heap access, denial of service, or security bypass on 24.04 LTS.

USN-8736-2 backports the Perl fixes from USN-8736-1 to Ubuntu 24.04 LTS. CVE-2026-15534 involves out-of-bounds heap reads or writes when regular expressions handle large inputs, potentially causing denial of service or arbitrary code execution. CVE-2026-19487 causes incorrect regex matching with alternative branches, allowing security restrictions to be bypassed.

Ubuntu Security Noticesupdated Sep 16, 20:12 UTC · 14h agofirst Sep 16, 14:37 UTC · 20h agoAdvisory 16 sources CVE-2026-15534 CVE-2026-19487

When a PNG Isn’t a PNG: WordPress Patches an Author-Level Imagick RCE

WordPress 7.0.4 patches an author-level RCE in how uploaded media is handed to ImageMagick.

WordPress maintenance release 7.0.4 includes a security fix that changes how uploaded media is passed to ImageMagick, closing a path that let a logged-in author turn a crafted image upload into remote code execution. Patchstack's analysis explains the flaw as a file-type handling issue where a PNG may not be treated as a PNG. The text does not mention a CVE ID or observed exploitation, but the flaw affects extremely widely deployed software.

PatchstackAug 12, 15:32 UTC · Aug 12, 2026Vulnerability

PostgreSQL Fixes 12-Year-Old Logical Decoding Flaw Enabling Replication-Role Code Execution

PostgreSQL fixed CVE-2026-6471 (CVSS 7.2), a 12-year-old logical decoding flaw letting replication-role accounts execute arbitrary code as the database OS user.

PostgreSQL patched CVE-2026-6471 (CVSS 7.2), a flaw present since logical decoding shipped in 9.4 (2014) that lets an account with the REPLICATION attribute run arbitrary code as the database server's OS user when wal_level is logical. Versions before 18.6, 17.11, 16.15, 15.19, and 14.24 are affected; exploitation requires such an account, which backup, CDC, and monitoring tooling routinely holds. The fix adds an output_plugin_libraries whitelist, so administrators using non-default plugins such as wal2json and decoderbufs must add them and reload configuration after updating. Cyera Research, whose write-up names the flaw PostGREShell, demonstrated escalating a replication user to superuser with persistence; no PoC or KEV entry existed as of September 4.

The Hacker NewsSep 4, 15:20 UTC · 12d agoVulnerability CVE-2026-64711

Decade-old PostgreSQL flaw turns backup account into a backdoor

Cyera disclosed CVE-2026-6471, a decade-old PostgreSQL flaw letting REPLICATION-attribute accounts achieve RCE and superuser compromise, patched August 13.

Cyera Research's 'PostGREShell' flaw exists in PostgreSQL's logical replication output plugin loading, where the replication code path never called the library-path security check, allowing path traversal or UNC paths to load arbitrary code. A low-privilege backup account can achieve code execution on Windows, Linux, and macOS, then escalate to superuser with persistent backdoor access. CVE-2026-6471 affects versions back to PostgreSQL 9.4 (2014) and was patched in releases 18.6, 17.11, 16.15, 15.19, and 14.24 on August 13. CVSS is 7.2, and no exploitation of this specific CVE has been confirmed, though VirusTotal hunting found 114 malicious PostgreSQL plugins.

CSO OnlineSep 3, 11:38 UTC · 13d agoVulnerability CVE-2026-6471

PoisonedRefresh: A Fileless Linux Rootkit That Injects PHP Web Shells Into F5 BIG-IP APM Server Memory

Sophos details PoisonedRefresh, a fileless Linux rootkit that injects a memory-resident PHP web shell into F5 BIG-IP APM after exploitation of CVE-2025-53521.

On September 8, 2026, SophosLabs published an analysis of Linux/Agnt-IC (dubbed PoisonedRefresh by ESET) found in compromised F5 BIG-IP Access Policy Manager environments. Initial access leverages CVE-2025-53521, an unauthenticated RCE in BIG-IP APM when an access policy is configured on a virtual server; F5 confirmed exploitation and links the activity to cluster c05d5254, while Shadowserver observed 795 exposed vulnerable endpoints. A first stage hidden in a modified umount binary modifies /usr/sbin/httpd and SELinux configuration and embeds itself in BIG-IP upgrade images for persistence. The second-stage ELF intercepts __libc_start_main, hooks apr_dso_load, and injects a PHP web shell into libphp memory via mmap manipulation, leaving no disk artifacts, and exposes a /bin/bash shell via a local UNIX domain socket instead of a TCP port.

Security AffairsSep 9, 08:50 UTC · 8d agoMalware in the wildCVE-2025-53521

VU#308749: Remote Code Execution and Arbitrary File Read Vulnerabilities in Kaltura Servers

Insecure deserialization in Kaltura's legacy HTML5 Player V2 (mwEmbed) allows arbitrary file read and remote code execution; Player V7 is unaffected.

CERT/CC issued VU#308749 for two flaws in Kaltura's HTML5 Player V2 library (mwEmbed/html5lib), both caused by the same insecure deserialization bug. The flaws enable arbitrary file read and remote code execution via the exposed mwEmbedLoader.php endpoint. Affected versions include html5lib v2.45, v2.103 and earlier, and other v2.x releases; the currently supported Player V7 is unaffected. No evidence of exploitation was cited.

CERT/CC Vulnerability NotesAug 25, 16:11 UTC · 22d agoVulnerability

TerminalFix campaign deploys a reverse tunnel through multistage intrusion

Microsoft Threat Intelligence details the TerminalFix campaign, which uses fake CAPTCHA prompts, DLL sideloading, and reverse tunnels in multistage intrusions.

Microsoft Threat Intelligence published analysis of a ClickFix-style campaign dubbed TerminalFix. The intrusion chain relies on fake CAPTCHA social engineering and DLL sideloading, and the attackers deploy a reverse tunnel to maintain access through a multistage intrusion. Microsoft released detections and threat hunting guidance for defenders.

Microsoft Security BlogAug 29, 03:43 UTC · 19d agoThreat actor in the wild

Linux Detection Engineering - Local Privilege Escalation

Elastic details a layered detection framework for Linux local privilege escalation, covering 2026's copy-on-write bug wave and LLM-assisted discovery.

Elastic Security Labs describes how most Linux local privilege escalations share a common host flow — an unprivileged process launched from a writable path becoming root — and proposes layered detections combining general outcome-based rules with per-technique rules in Elastic Defend and Auditd. It tracks 13 recent LPE disclosures, seven of which share a copy-on-write/zero-copy bug class, including Copy Fail, DirtyFrag, Fragnesia, DirtyDecrypt, DirtyClone, pedit COW, and RefluXFS. Qualys attributes RefluXFS to an LLM-assisted research effort with Anthropic using Claude Mythos Preview, and another bug is credited to an LLM-assisted workflow. Detection and endpoint rules are published in Elastic's detection-rules and protections-artifacts repositories.

Elastic Security LabsSep 11, 00:00 UTC · 6d agoResearch1

Hackers Hijack HBO Max Reddit Account to Push 108 ClickFix Malware Ads

Hijacked verified HBO Max Reddit account ran 108 ClickFix malvertising ads delivering AMOS infostealers, Windows loaders, and crypto clipboard hijackers.

HudsonRock and ADAMnetworks identified a cross-platform ClickFix operation dubbed PasteSwitch that abused the compromised verified Reddit account u/hbomax to publish 108 malicious ads over 48 hours, using domains like hbomaxx[.]us and codex-craft[.]com. macOS victims run curl/zsh commands delivering AMOS-related stealers and fake wallets, while Windows users get an InstallFix route using mshta and PowerShell that loads Amatera in memory and disables AMSI. The operation's AnimateClipper and ZigClipper families hijack clipboards to swap cryptocurrency addresses, with C2 domains rotated via Binance Smart Chain contracts. Reddit paused the ads and is investigating.

Cyber Security Newsupdated Sep 15, 11:51 UTC · 1d agofirst Sep 15, 06:56 UTC · 2d agoMalware in the wild 7 sources

CVE-2026-86287: Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths

CVE-2026-86287: Net::IP::LPM Perl library before 1.12 accepts malformed IP prefix lengths, risking incorrect longest-prefix-match results.

Net::IP::LPM versions before 1.12 for Perl accept malformed prefix lengths, per an oss-security disclosure posted September 7, 2026. The lax input validation in this longest-prefix-match library could produce incorrect matching behavior. The fix is available in version 1.12 on CPAN.

oss-securitySep 7, 18:40 UTC · 9d agoVulnerability CVE-2026-86287

Version Control DFIR: a Cheatsheet to GitHub, GitLab, Bitbucket, and Azure DevOps

Wiz published a DFIR cheatsheet covering log visibility, incident readiness, and threat hunting across GitHub, GitLab, Bitbucket, and Azure DevOps.

Wiz researchers released a practitioner's guide to version control system forensics, incident response, and threat hunting. The cheatsheet maps log sources, audit capabilities, and hunting workflows across GitHub, GitLab, Bitbucket, and Azure DevOps. It aims to improve incident readiness for source code and CI/CD compromise scenarios.

Wiz BlogAug 27, 12:00 UTC · 20d agoResearch1

CVE-2026-73334: Apache Parquet Hadoop: File-controlled KMS URL is forwarded to pluggable KmsClient that skips host validation

Apache Parquet Hadoop CVE-2026-73334: a file-controlled KMS URL reaches pluggable KmsClients without host validation in parquet-java 1.12 through 1.18.0.

Apache disclosed CVE-2026-73334, a moderate issue in the org.apache.parquet.crypto.keytools package of parquet-java, versions 1.12 through 1.18.0. The package implements envelope encryption that wraps data keys via a Key Management Service. A KMS URL controlled by the Parquet file is forwarded to a pluggable KmsClient that skips host validation, which could allow crafted files to redirect KMS requests.

oss-securitySep 8, 15:46 UTC · 8d agoVulnerability CVE-2026-733341

CVE-2026-70469: Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests

Apache NiFi CVE-2026-70469: duplicate or non-standard Content-Encoding headers bypass gzip request filtering in NiFi 2.11.0's REST API.

Apache NiFi disclosed CVE-2026-70469, rated High, affecting the Jetty-based REST API module (org.apache.nifi:nifi-jetty) in version 2.11.0. NiFi 2.11.0 disabled gzip-encoded HTTP requests and rejects those carrying the standard Content-Encoding header, but the framework enforcement filter fails to check multiple instances of the header and does not reject non-standard gzip identifiers, allowing crafted requests to evade the check. The disclosure was posted to oss-security by David Handermann.

oss-securitySep 16, 15:13 UTC · 19h agoVulnerability CVE-2026-70469