CVE-2026-100542

LOW 3.1

OpenClaw before 2026.8.1 Extraction Limit Bypass via tar.bz2

CVSS Score

3.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400
Vendor	openclaw
Product	openclaw
Published	Sep 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

OpenClaw / OpenClaw

2026.5.28 < 2026.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-6xpv-wwr5-265h vulncheck.com: https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-extraction-limit-bypass-via-tar-bz2