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Description

OpenClaw versions prior to 2026.2.26 fail to enforce sender authorization in member and message subtype system event handlers, allowing unauthorized events to be enqueued. Attackers can bypass Slack DM allowlists and per-channel user allowlists by sending system events from non-allowlisted senders through message_changed, message_deleted, and thread_broadcast events.

PUBLISHED Reserved 2026-03-16 | Published 2026-03-21 | Updated 2026-03-23 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-863: Incorrect Authorization

Product status

Default status
unaffected

Any version before 2026.2.26
affected

2026.2.26 (semver)
unaffected

Credits

tdjackey reporter

References

github.com/...enclaw/security/advisories/GHSA-v8cg-4474-49v8 (GitHub Security Advisory (GHSA-v8cg-4474-49v8)) third-party-advisory

github.com/...ommit/3d30ba18a2aba1e1b302e77ff33145c3b06c01c8 (Patch Commit) patch

www.vulncheck.com/...n-bypass-in-slack-system-event-handlers (VulnCheck Advisory: OpenClaw < 2026.2.26 - Sender Authorization Bypass in Slack System Event Handlers) third-party-advisory

cve.org (CVE-2026-32895)

nvd.nist.gov (CVE-2026-32895)

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