Auth bypass in Openclaw Crabbox
CVE-2026-8621
Crabbox prior to v0.12.0 contains an authentication bypass vulnerability that allows non-admin shared-token callers to impersonate other owners or organizations by spoofing identity headers. Attackers can inject malicious X-Crabbox-Owner and X-Crabbox-Org headers in requests authenticated with a shared token to bypass authorization checks and access owner/org-scoped lease operations belonging to victim accounts.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% 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: 0.007 · change: +0.003
Affected products
- Openclaw Crabbox — versions 0, b657323f1d1c954cefc8444571fa6c45a8896e7f
Weakness classification (CWE)
References
- github.com/openclaw/crabbox/releases/tag/v0.12.0 (release-notes)
- github.com/openclaw/crabbox/pull/70 (issue-tracking)
- github.com/openclaw/crabbox/commit/b657323f1d1c954cefc8444571fa6c45a8896e7f (patch)
- www.vulncheck.com/advisories/crabbox-authentication-bypass-via-header-spoofing (third-party-advisory)
Frequently asked questions
- What is CVE-2026-8621?
- CVE-2026-8621 is a high-severity vulnerability in Openclaw Crabbox, classified under Improper Authentication. CVSS score: 8.8/10. Published 2026-05-14.
- How severe is CVE-2026-8621?
- High severity. CVSS v3 base score is 8.8 out of 10.