GHSA-V8CG-4474-49V8

Vulnerability from github – Published: 2026-03-12 14:21 – Updated: 2026-03-30 13:39
VLAI?
Summary
OpenClaw: Slack system events bypass sender authorization in member and message subtype handlers
Details

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.

Severity ?
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Show details on source website
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2026.2.25"
      },
      "package": {
        "ecosystem": "npm",
        "name": "openclaw"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2026.2.26"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32895"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-12T14:21:59Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\nSlack `member_*` and `message` subtype system events (`message_changed`, `message_deleted`, `thread_broadcast`) were not consistently enforcing sender authorization before enqueueing system events.\n\n### Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Latest published version: `2026.2.25`\n- Affected range: `\u003c= 2026.2.25`\n- Planned patched version: `2026.2.26` (pre-set for publish-readiness)\n\n### Technical Details\nSlack 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.\n\nThe fix routes those handlers through `authorizeAndResolveSlackSystemEventContext(...)` and fails closed when message subtype sender identity cannot be resolved.\n\n### Fix Commit(s)\n- `3d30ba18a2aba1e1b302e77ff33145c3b06c01c8`\n\n### Release Process Note\n`patched_versions` is pre-set to `\u003e= 2026.2.26` so once npm `2026.2.26` is published, this advisory can be published without further field edits.\n\nThanks @tdjackey for reporting.",
  "id": "GHSA-v8cg-4474-49v8",
  "modified": "2026-03-30T13:39:01Z",
  "published": "2026-03-12T14:21:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-v8cg-4474-49v8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32895"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openclaw/openclaw/commit/3d30ba18a2aba1e1b302e77ff33145c3b06c01c8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openclaw/openclaw"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/openclaw-sender-authorization-bypass-in-slack-system-event-handlers"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenClaw: Slack system events bypass sender authorization in member and message subtype handlers"
}


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