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.

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.

EPSS: 0.003 (20.6th percentile) — read the EPSS interpretation.

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.

Affected products

Openclaw — versions 0, 2026.3.23

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

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-2026-35618?: 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.