Vulnerability in Openclaw
CVE-2026-27670
OpenClaw versions prior to 2026.3.2 contain a race condition vulnerability in ZIP extraction that allows local attackers to write files outside the intended destination directory. Attackers can exploit a time-of-check-time-of-use race between path validation and file write operations by rebinding parent directory symlinks to redirect writes outside the extraction root.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L.
EPSS exploit prediction
EPSS: 0.001 (1.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Openclaw — versions 0
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-r54r-wmmq-mh84 (vendor-advisory, Mitigation, Vendor Advisory, third-party-advisory)
- github.com/openclaw/openclaw/commit/7dac9b05dd9d38dd3929637f26fa356fd8bdd107 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-arbitrary-file-write-via-zip-extraction-p… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-27670?
- CVE-2026-27670 is a medium-severity vulnerability in Openclaw, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.3/10. Published 2026-03-19.
- How severe is CVE-2026-27670?
- Medium severity. CVSS v3 base score is 5.3 out of 10.