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 manipulate username changes to redirect webhook-triggered replies to different users, bypassing the intended recipient binding recorded in webhook events.

EPSS: 0.002 (14.7th 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

disclosure@vulncheck.com (vendor-advisory, Vendor Advisory, third-party-advisory)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (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.