Auth bypass in Openclaw
CVE-2026-100545
OpenClaw (npm package `openclaw`) before 2026.8.1 incorrectly enforces sender tool policies during session-memory filename generation. In affected versions, filename generation created an embedded helper that retained tools which the originating sender's policy had removed. When session-memory filename generation was enabled for an agent reachable by lower-trust senders, model-mediated instructions could cause the helper to invoke tools outside that sender's effective policy; the demonstrated impact was the creation of persistent scheduled work. Exploitability depends on the model acting on the injected instruction and on which tools the helper exposes. The issue is fixed in 2026.8.1; as a workaround, disable session-memory filename generation for agents reachable by lower-trust senders.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/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-5fwv-rrvp-8xvr (vendor-advisory)
- www.vulncheck.com/advisories/openclaw-before-2026.8.1-policy-bypass-via-session… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100545?
- CVE-2026-100545 is a medium-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2026-09-26.
- How severe is CVE-2026-100545?
- Medium severity. CVSS v3 base score is 5.3 out of 10.