Auth bypass in Openclaw
CVE-2026-100556
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.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-mm7m-wcgh-8mfq (vendor-advisory)
- www.vulncheck.com/advisories/openclaw-before-2026.8.1-authentication-bypass-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100556?
- CVE-2026-100556 is a medium-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 6.3/10. Published 2026-09-26.
- How severe is CVE-2026-100556?
- Medium severity. CVSS v3 base score is 6.3 out of 10.