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 · last modified .
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
EPSS: 0.003 (20.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-mm7m-wcgh-8mfq) (vendor-advisory)
- VulnCheck Advisory: OpenClaw before 2026.8.1 Authentication Bypass via Session Reset (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.