CVE-2026-35636: OpenClaw 2026.3.11 < 2026.3.25 - Session Isolation Bypass via sessionId Resolution

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-09 · updated 2026-06-17
Weakness: CWE-696

Description

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.

Affected products

OpenClaw: from 2026.3.11 before 2026.3.25 — fixed in 2026.3.25

How to fix

Upgrade to a fixed version: OpenClaw 2026.3.25. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/commit/d9810811b6c3c9266d7580f00574e5e02f7663de
https://github.com/openclaw/openclaw/security/advisories/GHSA-q2qc-744p-66r2
https://www.vulncheck.com/advisories/openclaw-session-isolation-bypass-via-sessionid-resolution

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