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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.

PUBLISHED Reserved 2026-04-04 | Published 2026-04-09 | Updated 2026-05-25 | Assigner VulnCheck




HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Problem types

CWE-696: Incorrect Behavior Order

Product status

Default status
unaffected

2026.3.11 (semver) before 2026.3.25
affected

2026.3.25 (semver)
unaffected

Credits

Nathan (@nexrin) reporter

KeenSecurityLab finder

References

github.com/...enclaw/security/advisories/GHSA-q2qc-744p-66r2 (GitHub Security Advisory (GHSA-q2qc-744p-66r2)) third-party-advisory

github.com/...ommit/d9810811b6c3c9266d7580f00574e5e02f7663de (Patch Commit) patch

www.vulncheck.com/...olation-bypass-via-sessionid-resolution (VulnCheck Advisory: OpenClaw 2026.3.11 < 2026.3.25 - Session Isolation Bypass via sessionId Resolution) third-party-advisory

cve.org (CVE-2026-35636)

nvd.nist.gov (CVE-2026-35636)

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