Auth bypass in Openclaw
CVE-2026-33576
OpenClaw before 2026.3.28 downloads and stores inbound media from Zalo channels before validating sender authorization. Unauthorized senders can force network fetches and disk writes to the media store by sending messages that are subsequently rejected.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (34.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.001
Affected products
- Openclaw — versions 0, 2026.3.28
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-v2v2-f783-358j) (vendor-advisory, third-party-advisory, Vendor Advisory)
- Patch Commit (Patch, patch)
- VulnCheck Advisory: OpenClaw < 2026.3.28 - Unauthorized Media Download via Zalo Channel (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-33576?
- CVE-2026-33576 is a medium-severity vulnerability in Openclaw, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-03-31.
- How severe is CVE-2026-33576?
- Medium severity. CVSS v3 base score is 6.5 out of 10.