{"id":"CVE-2026-101894","published":"2026-09-28T17:17:48.830","lastModified":"2026-09-28T18:17:17.730","description":"The decompress package for Node.js extracts archives. Prior to 10.2.2 and 11.1.4, the default decompress(input, output) API relies on lexical containment checks that do not account for the kernel following a planted symlink chain. An attacker can supply a crafted archive containing chained symlink entries so that a later entry resolves outside the output directory. This allows files outside output to be read or written, and overwriting startup scripts or configuration can lead to remote code execution. The maintained @xhmikosr/decompress package is fixed in 10.2.2 and 11.1.4, but the separately affected unmaintained decompress package remains unpatched through 4.2.1. This vulnerability results from a bypass of the incomplete hardening for CVE-2026-53486. @xhmikosr/decompress is fixed in versions 10.2.2 and 11.1.4.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-22","CWE-59"],"vendors":[],"products":[],"references":[{"url":"https://github.com/XhmikosR/decompress/commit/5f4b2f64abb31bbaf1fef8975b595fd7df2558d8","tags":[]},{"url":"https://github.com/XhmikosR/decompress/commit/f6c88c668216d6a12c6cecf4fe0b6c70bf77050a","tags":[]},{"url":"https://github.com/XhmikosR/decompress/releases/tag/v10.2.2","tags":[]},{"url":"https://github.com/XhmikosR/decompress/releases/tag/v11.1.4","tags":[]},{"url":"https://github.com/XhmikosR/decompress/security/advisories/GHSA-hrh2-vp3x-79xf","tags":[]}],"exploitRefs":[{"url":"https://github.com/XhmikosR/decompress/commit/5f4b2f64abb31bbaf1fef8975b595fd7df2558d8","tags":[]},{"url":"https://github.com/XhmikosR/decompress/commit/f6c88c668216d6a12c6cecf4fe0b6c70bf77050a","tags":[]},{"url":"https://github.com/XhmikosR/decompress/releases/tag/v10.2.2","tags":[]},{"url":"https://github.com/XhmikosR/decompress/releases/tag/v11.1.4","tags":[]},{"url":"https://github.com/XhmikosR/decompress/security/advisories/GHSA-hrh2-vp3x-79xf","tags":[]}],"hasPoc":true,"ai":{"summary":"This vulnerability allows an attacker to read or write files outside the intended output directory by exploiting symlink chains in the decompress package, potentially leading to remote code execution.","exploitability":"Exploitation requires the attacker to supply a crafted archive and control the symlink chain, making it moderately difficult. The vulnerability is present in versions prior to 10.2.2 and 11.1.4 of the decompress package.","blast_radius":"If exploited, this could lead to unauthorized access, data theft, or remote code execution, impacting the security and integrity of the system.","remediation":"Upgrade to @xhmikosr/decompress version 10.2.2 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","file-access","symlink","nodejs"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-29T08:54:20.080Z"}}