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Cpython: [CVE-2026-82049] tarfile extraction filters allow file modification and content disclosure via hard link to symlink
Python discloses CVE-2026-82049: tarfile extraction filters can be bypassed via hard links to symlinks, enabling file modification and content disclosure.
Stan Ulbrych disclosed CVE-2026-82049 on the Python security-announce list, forwarded to oss-security by Alan Coopersmith. The flaw affects CPython's tarfile extraction filters, which can allow file modification and content disclosure when archives contain a hard link to a symlink. Extraction-filter misuse can therefore bypass intended protections during archive unpacking.
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iceener/files-stdio-mcp-server: sandbox escape in fs_search via a symlinked directory (recursive walker validates only the top level)
iceener/files-stdio-mcp-server allows a read-side sandbox escape: fs_search follows symlinked directories while the recursive walker validates confinement only at the top level.
A vulnerability report describes a read-side sandbox escape in iceener/files-stdio-mcp-server, an MCP server for text-based file access that explicitly promises 'Sandboxed filesystem access. Only these paths are available'. The fs_search tool can follow symlinked directories outside the allowed paths, and the recursive directory-listing walker used by fs_search (and by fs_read) validates confinement only at the top level. The same flaw affects fs_read's directory-listing walker. No CVE identifier was assigned in the provided report text.
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Plesk Backup Manager Flaw Lets Low-Privileged Users Gain Root Access to Servers
CVE-2026-68488 in Plesk Backup Manager lets low-privileged subscription users exploit a symlink race during restores to gain root on Linux servers.
CVE-2026-68488 is a symlink race condition in Plesk Obsidian for Linux Backup Manager during subscription-content restore operations, allowing a user with Panel and FTP access to change ownership of files outside their subscription and escalate to full root access. Affected versions are Plesk for Linux 18.0.80.6 and earlier and 18.0.79.10 and earlier; Plesk for Windows is not affected. Patches are available in 18.0.80.7 and 18.0.79.11 or later. The flaw requires valid subscription access, so it is not unauthenticated remote code execution, but successful exploitation yields complete server compromise, especially dangerous in shared-hosting and multi-tenant deployments.
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USN-8741-1: Flatpak vulnerabilities
Ubuntu patched two Flatpak flaws, including a sandbox escape via app-controlled symlinks allowing host code execution (CVE-2026-34078).
Ubuntu security notice USN-8741-1 fixes two Flatpak vulnerabilities in Ubuntu 20.04 LTS, 22.04 LTS, and 24.04 LTS. CVE-2026-34078 stems from improper path validation in sandbox-expose options, letting a malicious or compromised Flatpak app use app-controlled symlinks to access arbitrary host files and gain code execution in the host context. CVE-2026-34079 involves improper path validation when removing outdated ld.so cache files, allowing a compromised app to delete arbitrary files on the host.
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Survey of filesystem MCP servers: how the "sandboxed filesystem" boundary is enforced (one breach, four defended-by-design)
Survey finds one filesystem MCP server vulnerable to a symlink-based sandbox escape while four others are defended by design.
A survey of five filesystem MCP servers assessed how each enforces its path-confinement boundary against symlink escapes in recursive directory walkers. The iceener/files-stdio-mcp-server is vulnerable to a read-side sandbox escape. The other four are defended by design or make no confinement claim. The author describes the vulnerability class as small but real.
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BleachBit 6.0.4 fixes secure wiping that skipped clusters on Windows
BleachBit 6.0.4 fixes Windows secure-wipe bugs that skipped fragmented-file clusters, adds HSTS tracker deletion, early macOS support, and broad hardening.
The open-source cleaner BleachBit released version 6.0.4, fixing Windows shredding bugs where fragmented files were wiped incompletely because noncontiguous clusters were skipped, leaving potentially sensitive data on disk. The release adds deletion of dynamic HSTS tracking data in six Chromium-based browsers and Zen, early macOS support including a Safari cleaner and full CLI, plus hardening such as absolute paths for ipconfig/taskkill, symlink and reparse-point handling, DTD-free XML parsing, and PATH/environment sanitization when running as root.
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deepseek-ai/DeepSeek-V4-Flash-Vision-Exp — new model trending #10 on Hugging Face
DeepSeek released DeepSeek-V4-Flash-Vision-Exp, its first experimental multimodal model, with large multimodal agent benchmark gains over V4-Flash-0731.
DeepSeek AI published DeepSeek-V4-Flash-Vision-Exp, an experimental multimodal model built on the DeepSeek-V4-Flash architecture with added visual modules and continued training. It scores 83.9 on Terminal Bench 2.1 and 36.5 on ApexBench Pass@1 versus 26.2 for DeepSeek-V4-Flash-0731, while remaining comparable to Opus-4.8 on several benchmarks. The MIT-licensed repository ships a tokenizer, OpenAI-style and TXT prompt encoding, and a minimal PyTorch inference implementation, with vLLM and SGLang deployment recipes.
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A patched Windows attack surface is still exploitable
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