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.

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 ma…

EPSS: 0.001 (26.5th percentile) — read the EPSS interpretation.

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.

Affected products

Openclaw — versions 0, 2026.3.22

Weakness classification (CWE)

CWE-807

References

GitHub Security Advisory (GHSA-wv46-v6xc-2qhf) (third-party-advisory)
Patch Commit #1 (patch)
Patch Commit #2 (patch)
VulnCheck Advisory: OpenClaw < 2026.3.22 - Webhook Reply Rebinding via Username Resolution in Synology Chat (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.