Vulnerability in Openclaw
CVE-2026-41338
OpenClaw before 2026.3.31 contains a time-of-check-time-of-use vulnerability in sandbox file operations that allows attackers to bypass fd-based defenses. Attackers can exploit check-then-act patterns in apply_patch, remove, and mkdir operations to manipulate files between validation and execution.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:L.
EPSS exploit prediction
EPSS: 0.001 (1.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.5% 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, 2026.3.31
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-rm5c-4rmf-vvhw (vendor-advisory, Vendor Advisory)
- github.com/openclaw/openclaw/commit/32a4a47d602e0618f87b3e59f94d8c142767f860 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-time-of-check-time-of-use-toctou-vulnerab… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-41338?
- CVE-2026-41338 is a medium-severity vulnerability in Openclaw, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.0/10. Published 2026-04-23.
- How severe is CVE-2026-41338?
- Medium severity. CVSS v3 base score is 5.0 out of 10.