Vulnerability in Openclaw
CVE-2026-28475
OpenClaw versions prior to 2026.2.13 use non-constant-time string comparison for hook token validation, allowing attackers to infer tokens through timing measurements. Remote attackers with network access to the hooks endpoint can exploit timing side-channels across multiple requests to gradually recover the authentication token.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Openclaw — versions 0
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-47q7-97xp-m272 (vendor-advisory, Vendor Advisory)
- github.com/openclaw/openclaw/commit/113ebfd6a23c4beb8a575d48f7482593254506ec (Patch, patch)
- www.vulncheck.com/advisories/openclaw-timing-attack-via-hook-token-comparison (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-28475?
- CVE-2026-28475 is a medium-severity vulnerability in Openclaw, classified under CWE-208. CVSS score: 4.8/10. Published 2026-03-05.
- How severe is CVE-2026-28475?
- Medium severity. CVSS v3 base score is 4.8 out of 10.