Auth bypass in Openclaw
CVE-2026-100550
OpenClaw (npm package 'openclaw') before 2026.8.1 contains an access-control bypass in the Microsoft Teams integration. When groupPolicy is set to allowlist, a missing or unsupported configured access group produces a denied group-resolution result that is not rejected by the final message-admission check, so a Teams member who is not on the allowlist can still trigger the configured agent despite the administrator's group boundary. The impact depends on the conversations, tools, and data available to that agent. The issue is fixed in version 2026.8.1.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
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-8938-r7c6-54vq (vendor-advisory)
- www.vulncheck.com/advisories/openclaw-before-2026.8.1-authentication-bypass-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100550?
- CVE-2026-100550 is a medium-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-09-26.
- How severe is CVE-2026-100550?
- Medium severity. CVSS v3 base score is 5.4 out of 10.