CVE-2026-100556 OpenClaw before 2026.8.1 Authentication Bypass via Session Reset
A group member denied command access can reset the session to override provider and model settings, bypassing authorization controls.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-100556?
CVE-2026-100556 is a medium-severity missing authorization vulnerability in OpenClaw, published on 26 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-100556?
How do I fix CVE-2026-100556?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-100556 being exploited?
There is no known exploitation of CVE-2026-100556 in the wild and no public exploit code.
Sources
Also known as GHSA-8hvw-855c-9wjw, GHSA-mm7m-wcgh-8mfq, MINI-8p5p-8rr2-3567.