What is CVE-2026-34503?

CVE-2026-34503 is a high-severity vulnerability in Openclaw, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2026-03-31.

How severe is CVE-2026-34503?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Openclaw

CVE-2026-34503

OpenClaw before 2026.3.28 fails to disconnect active WebSocket sessions when devices are removed or tokens are revoked. Attackers with revoked credentials can maintain unauthorized access through existing live sessions until forced reconnection.

EPSS: 0.003 (25.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Openclaw — versions 0, 2026.3.28

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

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

Frequently asked questions

What is CVE-2026-34503?: CVE-2026-34503 is a high-severity vulnerability in Openclaw, classified under Insufficient Session Expiration. CVSS score: 8.1/10. Published 2026-03-31.
How severe is CVE-2026-34503?: High severity. CVSS v3 base score is 8.1 out of 10.