Vulnerability · Published Sep 26, 2026 · Assigned by VulnCheck
CVE-2026-100542OpenClaw before 2026.8.1 Extraction Limit Bypass via tar.bz2
Low 3.1
In plain English
A low-severity uncontrolled resource consumption in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Official description
OpenClaw (npm package 'openclaw') versions >= 2026.5.28 and < 2026.8.1 mishandle archive listings in the tar.bz2 skill installer: bounded command-output suffixes were treated as complete listings of the archive. A crafted .tar.bz2/.tbz2 skill archive can push prohibited entries out of both retained listings so that entry-count and size checks pass, and the archive is then extracted in full. If an operator approves installation of such a malicious or compromised skill archive, over-limit files or entry counts are persisted in the skill tools directory, consuming disk space or inodes. The issue bypasses OpenClaw's extraction budgets but does not by itself execute archive contents. Fixed in 2026.8.1.
Affected products (as reported)
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- GitHub Security Advisory (GHSA-6xpv-wwr5-265h) vendor-advisory
- VulnCheck Advisory: OpenClaw before 2026.8.1 Extraction Limit Bypass via tar.bz2 third-party-advisory