Vulnerability in Openclaw
CVE-2026-35618
OpenClaw before 2026.3.23 contains a replay identity vulnerability in Plivo V2 signature verification that allows attackers to bypass replay protection by modifying query parameters. The verification path derives replay keys from the full URL including query strings instead of the canonicalized base URL, enabling attackers to mint new verified request keys through unsigned query-only changes to signed requests.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.6% 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: 0.004 · change: +0.001
Affected products
- Openclaw — versions 0, 2026.3.23
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-cg6c-q2hx-69h7 (vendor-advisory, Vendor Advisory, third-party-advisory)
- github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87 (Patch, patch)
- github.com/openclaw/openclaw/commit/b0ce53a79cf63834660270513e26d921899b4e5b (Patch, patch)
- www.vulncheck.com/advisories/openclaw-replay-identity-drift-via-query-only-vari… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-35618?
- CVE-2026-35618 is a medium-severity vulnerability in Openclaw, classified under Authentication Bypass by Capture-replay. CVSS score: 6.5/10. Published 2026-04-09.
- How severe is CVE-2026-35618?
- Medium severity. CVSS v3 base score is 6.5 out of 10.