Auth bypass in Openclaw
CVE-2026-33578
OpenClaw before 2026.3.28 contains a sender policy bypass vulnerability in the Google Chat and Zalouser extensions where route-level group allowlist policies silently downgrade to open policy. Attackers can exploit this policy resolution flaw to bypass sender restrictions and interact with bots despite configured allowlist restrictions.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% 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
- Openclaw — versions 0, 2026.3.28
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-63mg-xp9j-jfcm) (vendor-advisory, third-party-advisory, Vendor Advisory)
- Patch Commit (Patch, patch)
- VulnCheck Advisory: OpenClaw < 2026.3.28 - Sender Policy Allowlist Bypass via Policy Downgrade in Google Chat and Zalouser Extensions (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-33578?
- CVE-2026-33578 is a medium-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-03-31.
- How severe is CVE-2026-33578?
- Medium severity. CVSS v3 base score is 4.3 out of 10.