Vulnerability in Openclaw
CVE-2026-35636
OpenClaw versions 2026.3.11 through 2026.3.24 contain a session isolation bypass vulnerability where session_status resolves sessionId to canonical session keys before enforcing visibility checks. Sandboxed child sessions can exploit this to access parent or sibling sessions that should be blocked by explicit sessionKey restrictions.
EPSS: 0.003 (17.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Openclaw — versions 2026.3.11, 2026.3.25
Weakness classification (CWE)
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-2026-35636?
- CVE-2026-35636 is a medium-severity vulnerability in Openclaw, classified under CWE-696. CVSS score: 6.5/10. Published 2026-04-09.
- How severe is CVE-2026-35636?
- Medium severity. CVSS v3 base score is 6.5 out of 10.