research

セキュリティ研究 私が発見したセキュリティ脆弱性（CVE）に関するリポジトリです。本リポジトリには、発見した脆弱性の詳細な技術文書、概念実証（PoC）エクスプロイト、および分析が含まれています。 概要 本リポジトリは、私が発見・調査したすべてのCVEをまとめたもので、以下を含みます： 各脆弱性の詳細な技術分析 教育目的の概念実証（PoC）コード 攻撃シナリオと影響評価 修正状況とパッチ情報 公式CVEレコードへの参照 発見したCVE CVE-2026-26158 - BusyBox Hardlink Bypass 9.3 緊急 CVE-2026-26157 - BusyBox Path...

TencentOS Server 3: python3.12 (TSSA-2026:0989)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0989 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

GHSA-F794-5JV7-7672 NLTK: Downloader.download follows hardlinks and overwrites outside-root files

Summary NLTK's downloader now blocks symlink escapes during ZIP extraction, but it still treats pre-existing hardlinks inside the install tree as ordinary in-root files. A normal package install can therefore overwrite an outside-root inode through that hardlink. Details - Vulnerability type:...

UBUNTU-CVE-2026-81727

NLTK versions before 3.10.3 contain a filesystem containment bypass vulnerability in the Downloader.download and Downloader.incrdownload methods that allows attackers to overwrite files outside the install root through pre-existing hardlinks. Attackers with write access to a shared downloader...

TencentOS Server 4: python3.11 (TSSA-2026:0861)

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0861 advisory. Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:...

python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory

A flaw was found in the tarfile.extractall function within Python. A remote attacker could exploit this vulnerability by providing a specially crafted archive. This archive could bypass security filters by using a hardlink that references a symlink, allowing the symlink to be recreated outside th...

python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory

A flaw was found in the tarfile.extractall function within Python. A remote attacker could exploit this vulnerability by providing a specially crafted archive. This archive could bypass security filters by using a hardlink that references a symlink, allowing the symlink to be recreated outside th...

CVE-2026-54727 proot-distro has a Container Isolation Bypass via Crafted Restore Archive

proot-distro is a utility for managing proot containers. Prior to version 5.1.6, proot-distro restore accepted hardlink entries whose linkname referenced another installed container and did not verify that the hardlink source container matched the destination container being restored, allowing a...

python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory

A flaw was found in the tarfile.extractall function within Python. A remote attacker could exploit this vulnerability by providing a specially crafted archive. This archive could bypass security filters by using a hardlink that references a symlink, allowing the symlink to be recreated outside th...

node-tar: tar: node-tar: Arbitrary file creation via path traversal bypass in hardlink security check

A flaw was found in node-tar, a Node.js module for handling TAR archives. This vulnerability allows a remote attacker to bypass path traversal protections by crafting a malicious TAR archive. The security check for hardlink entries uses different path resolution logic than the actual hardlink...

linux-sgx security update

An update is available for linux-sgx. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The Intel SGX SDK is a collection of APIs, libraries, documentations and...

node-tar: tar: node-tar: Arbitrary file creation via path traversal bypass in hardlink security check

A flaw was found in node-tar, a Node.js module for handling TAR archives. This vulnerability allows a remote attacker to bypass path traversal protections by crafting a malicious TAR archive. The security check for hardlink entries uses different path resolution logic than the actual hardlink...

Security Bulletin: Vulnerability in node-tar affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge.

Summary Potential vulnerability in node-tar has been identified that affects IBM watsonx Assistant Cartridge and IBM watsonx Orchestrate with watsonx Assistant Cartridge - Assistant Builder Component. . The vulnerability have been addressed. Refer to details for additional information...

ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load

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GHSA-CMW6-HCPP-C6JP ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load

Summary The issue is in onnx.load — the code checks for symlinks to prevent path traversal, but completely misses hardlinks, which is the problem, since a hardlink looks exactly like a regular file on the filesystem. The Real Problem The validator in onnx/checker.cc only calls issymlink and never...

ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load

Summary The issue is in onnx.load — the code checks for symlinks to prevent path traversal, but completely misses hardlinks, which is the problem, since a hardlink looks exactly like a regular file on the filesystem. The Real Problem The validator in onnx/checker.cc only calls issymlink and never...

CVE-2026-34446 ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load

Open Neural Network Exchange ONNX is an open standard for machine learning interoperability. Prior to version 1.21.0, there is an issue in onnx.load, the code checks for symlinks to prevent path traversal, but completely misses hardlinks because a hardlink looks exactly like a regular file on the...

CVE-2026-34446 ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load

Open Neural Network Exchange ONNX is an open standard for machine learning interoperability. Prior to version 1.21.0, there is an issue in onnx.load, the code checks for symlinks to prevent path traversal, but completely misses hardlinks because a hardlink looks exactly like a regular file on the...

CVE-2026-34446

CVE-2026-34446 affects Open Neural Network Exchange (ONNX). The vulnerability is in onnx.load where hardlinks can bypass the path-traversal check, allowing an arbitrary file read. The issue is fixed in ONNX 1.21.0. Impact is described as arbitrary file read with LOCAL attack vector and MEDIUM bas...

CVE-2026-32232 ZeptoClaw: Path boundary checks bypass via symlink, TOCTOU, and hardlink

ZeptoClaw is a personal AI assistant. Prior to 0.7.6, there is a Dangling Symlink Component Bypass, TOCTOU Between Validation and Use, and Hardlink Alias Bypass. This vulnerability is fixed in 0.7.6...