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CVE-2026-59739: Apache ZooKeeper: Information disclosure via SetWatches reconnect replay

CVE-2026-59739: Apache ZooKeeper missing ACL check in SetWatches reconnect replay lets attackers discover ACL-restricted znode paths.

Apache ZooKeeper versions 3.8.0-3.8.6 and 3.9.0-3.9.5 contain a critical information disclosure (CVE-2026-59739) caused by a missing ACL check during SetWatches reconnect replay. An attacker can register exists-watches on non-existent paths and reconnect after those paths are created, revealing the existence of ACL-restricted paths. The issue is fixed in patched releases.

oss-security · 1d agoVulnerabilityCVE-2026-59739

New DDRop Attack Breaks Intel TDX and AMD SEV-SNP With $159 DDR5 Device

DDRop uses a $159 DDR5 RDIMM interposer to silently drop memory writes and break Intel TDX and AMD SEV-SNP confidential VMs.

Researchers published DDRop, a physical attack built from about $159 in parts that uses a custom DDR5 RDIMM interposer to inject parity errors and silently discard selected cache-line writebacks. Intel TDX, Intel Scalable SGX, and AMD SEV-SNP are affected because they lack per-line cryptographic freshness, so processors can accept stale encrypted data as valid state. The team demonstrated deterministic plaintext copying between pages, malicious Secure EPT entry injection, forcing trust domains into debug mode, and forging attestation measurements. The attack requires privileged host control plus brief physical access, and researchers say no simple software patch exists.

Cyber Security News · 2d agoResearch 2 sources

New hardware device can RAM into encrypted memory, expose your data

Researchers built a $200 DDR5 interposer that silently drops memory writes to break TDX, SGX, and SEV-SNP confidential VM integrity, requiring physical access.

Researchers from KU Leuven, ETH Zurich, Durham University, and Google demonstrated DDRop, a hardware interposer costing under $200 that corrupts DDR5 bus commands to silently drop writes to encrypted memory, enabling replay attacks on confidential VMs. Because scalable memory encryption lacks freshness checks, protected VMs keep computing on stale attacker-selected data; on an Intel TDX server the attack forces debug mode for plaintext memory reads or forges attestation reports, succeeding in under two minutes without crashing. Intel and AMD both called the attack out of scope for their cloud threat models, with no mitigation planned, and proposed cache line versioning appears still vulnerable. The full interposer design is being released as open-source hardware.

The Register · Security · 2d agoResearch

DDRop Attack Forces Intel TDX Confidential VMs Into Debug Mode and Exposes Memory

KU Leuven and ETH Zurich researchers released DDRop PoC hardware that forces Intel TDX confidential VMs into debug mode and exposes plaintext memory.

Researchers from KU Leuven, ETH Zurich, Google, and Durham University published proof-of-concept code, hardware designs, and firmware for DDRop, a DDR5 interposer that injects parity errors to drop selected cache-line writebacks. Because Intel TDX, Intel Scalable SGX, and AMD SEV-SNP lack per-line cryptographic freshness, processors decrypt and accept stale DRAM contents as current state. The PoC flips a victim's ATTRIBUTES.DEBUG flag to enable TDX debug mode, then copies victim memory in plaintext and can forge attestation reports. Affected environments include Intel 5th- and 6th-generation Xeon Scalable with TDX; Intel says the attack falls outside its cloud-computing threat model.

GBHackers · 2d agoResearch

TP-Link Cameras 0-Day Vulnerabilities Allow Attackers to Spy on Users

Two zero-day flaws in TP-Link Tapo C200 cameras allowed authentication bypass and denial-of-service; fixed in firmware V5_1.4.6.

OPSWAT researchers Khoi Tran and Thai Do found CVE-2026-15315, an authentication bypass in the Tapo C200's local HTTPS interface that lets network-adjacent attackers replay an authentication value to gain administrator access, and CVE-2026-15316, an unauthenticated denial-of-service in the Wi-Fi onboarding process that crashes the camera's HTTPS service. TP-Link was notified on April 16, 2026, confirmed the flaws on July 10, and released patches on August 18, 2026 in firmware V5_1.4.6. Exploitation requires local network access but no valid account, existing session, or user interaction, exposing live feeds and stored recordings to surveillance risk.

Cyber Security News · 1d agoVulnerability 3 sourcesCVE-2026-15315CVE-2026-15316

Microsoft Offers $60,000 Bounty for Critical Cross-Tenant Vulnerabilities

Microsoft expands Dynamics 365 and Power Platform bug bounty, paying up to $60,000 for critical cross-tenant vulnerabilities.

Microsoft expanded its bounty incentives for Dynamics 365 and Power Platform, with qualifying rewards from $1,250 to $60,000. Critical cross-tenant vulnerabilities receive a 100% award multiplier and important ones 50%, while critical AI inference manipulation or inferential disclosure can earn up to $30,000. Scope covers Dynamics 365 apps, Power Apps, Power Automate, Copilot Studio, Power Pages, Dataverse, and selected on-premises products. Reports must be rated Critical or Important and submitted via the MSRC Researcher Portal.

GBHackers · 2d agoIndustry1

AI agent authorization risks remain a gap in new NIST-CISA token security guidance

NIST and CISA release IR 8587 guidance on securing signed tokens, but AI agent authorization and delegation risks remain out of scope.

NIST, with CISA support, published 'Protecting Tokens and Assertions from Forgery, Theft, and Misuse' (NIST IR 8587), recommending continuous monitoring and tighter token lifecycle controls for SSO and API access. The guidance does not yet fully address AI agent identity, delegation chains, or prompt injection steering agents with valid tokens, and NIST says new or expanded standards are needed. Experts recommend treating AI agents as low-trust non-human identities, maintaining agent inventories, expiring credentials after task completion, and requiring human approval for high-risk actions. The report references shared-signal mechanisms like CAEP and RISC, and follows a May incident where a CISA contractor GitHub repository exposed AWS and GitHub tokens.

CSO Online · 21h agoAdvisory

CISA and NIST Release Technical Checklist for Safeguarding Identity Tokens From Theft and Misuse

CISA and NIST published NIST IR 8587, final guidance for protecting identity tokens from forgery, theft, replay, and signing-key compromise.

NIST Interagency Report 8587 (September 15, 2026) expands the IA-13 'Identity Providers and Authorization Servers' control from NIST SP 800-53 R5.1.1, guiding federal agencies and cloud providers on SSO, identity federation, and machine-to-machine authentication. It requires hardware-backed signing-key storage for moderate-impact systems, 90-day key rotation for high-impact systems, token lifetimes under one hour, and sender-constrained mechanisms such as mutual TLS and DPoP. The report cites incidents including forged SAML assertions that exposed over 60,000 emails from a federal agency. It also extends guidance to agentic AI systems using signed tokens and urges post-quantum cryptography migration planning.

Cyber Security News · 1d agoAdvisory1

NIST Issues New Guidance to Protect SSO and API Tokens From Theft and Forgery

NIST released IR 8587 giving agencies and cloud providers recommendations to prevent identity token forgery, theft, and misuse in SSO and API environments.

NIST Internal Report 8587, released September 15, 2026, provides implementation recommendations covering token creation, signing, validation, storage, revocation, and lifecycle management for SAML, OpenID Connect, and OAuth 2.0 environments. It builds on SP 800-53 Rev. 5.1.1 and incorporates lessons from breaches involving stolen signing keys, abused OAuth applications, and replayed federated assertions. Recommendations include strong signing algorithms, strict claim validation, short token lifetimes, token binding, leakage prevention, and monitoring for abnormal token use.

GBHackers · 1d agoAdvisory 2 sources

Cyber Adversary Simulation (CyAS): scheme documents now available

NCSC published adversary simulation guidance and the first Cyber Adversary Simulation (CyAS) scheme documents ahead of the scheme's November 2026 launch.

The UK NCSC released guidance on adversary simulation engagements and the first CyAS scheme documents, including the Scheme Standard and the Working Practices Document. The capability-led scheme, developed with cyber oversight bodies, will formally launch in November 2026 and assess companies seeking NCSC-assured provider status. NCSC describes the current version as a minimum viable product to be refined with feedback from buyers and providers.

NCSC UK · 4h agoAdvisory 2 sources

Enterprises Warned of Attacks Exploiting WSO2 Vulnerability

Attackers are actively exploiting CVE-2026-5430 (CVSS 10), a WSO2 JWT authentication bypass, to access enterprise API credentials and sensitive data.

WatchTowr's honeypot network recorded the first exploitation attempt of CVE-2026-5430 on September 13, roughly two months after the CVE record was published in early August. The flaw, patched by WSO2 in April with an advisory in May, carries a maximum CVSS score of 10 and allows JWT authentication bypass via tokens signed with unsupported algorithms, enabling unauthorized access and full account takeover. A forged JWT observed in the wild granted access to API backend endpoints, credentials, and consumer keys and secrets for every registered application. WSO2's API Manager, API Control Plane, Traffic Manager, and Universal Gateway are affected, and the platform serves nearly 1,000 enterprise customers in banking, government, telecom, and logistics.

SecurityWeekupdated · 22h agofirst · 1d agoExploit / PoC in the wild 3 sourcesCVE-2026-54302· 1 read

Marimo RCE Flaw Lets Hackers Steal AWS Credentials and Pivot to Bastion Host in 8 Seconds

Attacker exploited unauthenticated marimo WebSocket RCE CVE-2026-39987 to steal AWS credentials and SSH into a bastion host in eight seconds.

Sysdig Threat Research Team documented a real intrusion exploiting CVE-2026-39987 in marimo (versions up to 0.20.4, fixed in 0.23.0), where the unauthenticated /terminal/ws WebSocket endpoint exposed an interactive shell. Within eight seconds the attacker pulled AWS credentials from Redis, extracted an SSH private key from AWS Secrets Manager via Boto3, and authenticated to a bastion host; over nine hours the operator ran 850+ commands using a staged custom Python toolkit. Blocked EC2 Instance Connect attempts (SendSSHPublicKey to placeholder instance i-0000000000000000) provide a high-confidence detection signal.

GBHackersupdated · 2d agofirst · 2d agoExploit / PoC in the wild 4 sourcesCVE-2026-399873· 1 read

Closing the Loop: Bidirectional Fully Encrypted Protocols

Researchers show naively composing unidirectional fully encrypted protocols is detectable and construct provably secure bidirectional FEPs, validated in Rust.

The paper introduces formal security definitions for bidirectional fully encrypted protocols (BiFEPs), covering exact shaping, delivery, protocol-state integrity, private half-close, and cross-direction isolation. It shows trivially composing two unidirectional FEPs enables detection attacks via cross-direction dependencies like traffic imbalance and connection tear-down. The authors construct provably secure BiFEPs for datastream and datagram settings, validated with a Rust implementation; no surveyed deployed protocol provides the full set of properties.

arXiv cs.CR · 1d agoResearch