CVE-2026-102282

adm-zip extraction preserves SUID/SGID bits from untrusted ZIPs -> local privilege escalation

HIGH 7.1EPSS 0.1%

adm-zip is a JavaScript library for creating and extracting ZIP archives in Node.js. Prior to 0.6.1, adm-zip applies the Unix permission bits stored in a zip entry directly to the extracted file via `fs.chmodSync()` when `keepOriginalPermission=true` is passed to `extractAllTo()`/`extractEntryTo()` — and it never filters the setuid/setgid/sticky bits out of those bits. A zip crafted by an attacker can therefore produce an extracted binary with mode `04755`. When extraction runs as root (the default posture in Docker builds, CI runners, and privileged install steps — the exact environments where this flag is used), the resulting root-owned setuid file is executed later by a lesser-privileged user, turning the attacker's code into a root execution. Version 0.6.1 fixes the issue.

Affected: cthackers · adm-zip
CVSS v3.1 GITHUB: 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.15% chance of exploitation in the next 30 days, 4th percentile
Published: 2026-10-05
Updated: 2026-10-07

CVE-2026-102282

Proof-of-concept exploits (2)

References