CVE-2026-100542 PUBLISHED

OpenClaw before 2026.8.1 Extraction Limit Bypass via tar.bz2

Assigner: VulnCheck
Reserved: 26.09.2026 Published: 26.09.2026 Updated: 26.09.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS Score: 2.3

Product Status

Vendor OpenClaw
Product OpenClaw
Versions Default: unaffected
  • affected from 2026.5.28 to 2026.8.1 (excl.)
  • Version 2026.8.1 is unaffected

References

Problem Types

  • Uncontrolled Resource Consumption CWE