Vulnerability in Openclaw
CVE-2026-35670
OpenClaw before 2026.3.22 contains a webhook reply delivery vulnerability that allows attackers to rebind chat replies to unintended users by exploiting mutable username matching instead of stable numeric user identifiers. Attackers can manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Openclaw — versions 0, 2026.3.22
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-wv46-v6xc-2qhf (vendor-advisory, Vendor Advisory, third-party-advisory)
- github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87 (Patch, patch)
- github.com/openclaw/openclaw/commit/7ade3553b74ee3f461c4acd216653d5ba411f455 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-webhook-reply-rebinding-via-username-reso… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-35670?
- CVE-2026-35670 is a medium-severity vulnerability in Openclaw, classified under CWE-807. CVSS score: 5.9/10. Published 2026-04-10.
- How severe is CVE-2026-35670?
- Medium severity. CVSS v3 base score is 5.9 out of 10.