OpenClaw: Slack system events bypass sender authorization in member and message subtype handlers
Summary
Slack member_* and message subtype system events (message_changed, message_deleted, thread_broadcast) were not consistently enforcing sender authorization before enqueueing system events.
Affected Packages / Versions
- Package:
openclaw(npm) - Latest published version:
2026.2.25 - Affected range:
<= 2026.2.25 - Planned patched version:
2026.2.26(pre-set for publish-readiness)
Technical Details
Slack system-event handlers in src/slack/monitor/events/members.ts and src/slack/monitor/events/messages.ts enqueued events after channel checks without shared sender authorization. Deployments relying on Slack DM allowlists (dmPolicy / allowFrom) or per-channel users allowlists could receive unauthorized system-event ingress from non-allowlisted senders.
The fix routes those handlers through authorizeAndResolveSlackSystemEventContext(...) and fails closed when message subtype sender identity cannot be resolved.
Fix Commit(s)
3d30ba18a2aba1e1b302e77ff33145c3b06c01c8
Release Process Note
patched_versions is pre-set to >= 2026.2.26 so once npm 2026.2.26 is published, this advisory can be published without further field edits.
Thanks @tdjackey for reporting.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | openclaw | < 2026.2.26 | 2026.2.26 |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-v8cg-4474-49v8
- https://nvd.nist.gov/vuln/detail/CVE-2026-32895
- https://github.com/openclaw/openclaw/commit/3d30ba18a2aba1e1b302e77ff33145c3b06c01c8
- https://github.com/openclaw/openclaw
- https://www.vulncheck.com/advisories/openclaw-sender-authorization-bypass-in-slack-system-event-handlers
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-863- Platform
- npm
- Package
openclaw- Disclosed
- 12.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v8cg-4474-49v8 - CC BY 4.0
Vulnerability history: openclaw
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 588
- First → latest
- 02.2026 07.2026
- Without a fix
- 9
- Exploited in attacks
- 0
Severity breakdown
- Critical 20
- High 215
- Medium 299
- Low 54
Disclosures per year
- 2026: 588
-
OpenClaw: Slack system events bypass sender authorization in member and message subtype handlers this entry
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