CVE-2026-32895: OpenClaw Slack System Events Bypass Sender Vulnerability

MODERATE
Advisory Identifier: GHSA-v8cg-4474-49v8
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CVSS 5.4
CWE-863
Published
Advisory Summary

CVE-2026-32895 is a MODERATE (CVSS 5.4) slack system events bypass sender vulnerability (CWE-863: Incorrect Authorization) affecting OpenClaw libraries in the npm ecosystem. The issue involves slack system events bypass sender authorization in member and message subtype handlers. Remediation is available by upgrading affected packages to version 2026.2.26.

CVE-2026-32895 at a Glance

CVE Identifier CVE-2026-32895
GHSA Identifier GHSA-v8cg-4474-49v8
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-863: Incorrect Authorization
Affected Product OpenClaw
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-32895

To remediate this vulnerability, upgrade all affected OpenClaw dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

openclaw fixed: 2026.2.26 
npm install openclaw@2026.2.26
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls openclaw

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-32895, inspect your project dependencies using npm:

npm ls openclaw

Analyze the terminal output to locate any version of OpenClaw in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2026.2.26), your application is affected.

Note: The npm ls openclaw command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In OpenClaw, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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.

CVE-2026-32895 Affected OpenClaw Versions

1 component(s)
Fixed Versions:
2026.2.26
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.2.26
2026.2.26

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-v8cg-4474-49v8
NVD — CVE-2026-32895 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32895
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/3d30ba18a2aba1e1b302e77ff33145c3b06c01c8
OpenClaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-sender-authorization-bypass-in-slack-system-event-handlers

Frequently Asked Questions

What is CVE-2026-32895?
CVE-2026-32895 is a security vulnerability in OpenClaw involving Slack system events bypass sender authorization in member and message subtype handlers under CWE-863: Incorrect Authorization.
Which OpenClaw versions are affected?
Affected versions include releases prior to 2026.2.26 across affected packages: openclaw.
What version fixes CVE-2026-32895?
Upgrading to 2026.2.26 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.2.26. Upgrade your dependency to 2026.2.26 or later.
What is the CVSS score of CVE-2026-32895?
CVE-2026-32895 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2026-32895?
CVE-2026-32895 is classified under CWE-863: Incorrect Authorization (The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.).
How can I check npm dependencies for CVE-2026-32895?
Run the dependency tree command: 'npm ls openclaw'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-v8cg-4474-49v8",
  "modified" : "2026-03-30T13:39:01Z",
  "published" : "2026-03-12T14:21:59Z",
  "aliases" : [ "CVE-2026-32895" ],
  "summary" : "OpenClaw: Slack system events bypass sender authorization in member and message subtype handlers",
  "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: `<= 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 `>= 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.2.26"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2026.2.25"
    }
  } ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-863" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-12T14:21:59Z",
    "nvd_published_at" : null
  }
}