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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (38.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Openclaw — versions 2026.3.11, 2026.3.25
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-q2qc-744p-66r2 (vendor-advisory, Vendor Advisory, third-party-advisory)
- github.com/openclaw/openclaw/commit/d9810811b6c3c9266d7580f00574e5e02f7663de (Patch, patch)
- www.vulncheck.com/advisories/openclaw-session-isolation-bypass-via-sessionid-re… (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.