# CVE-2026-8621: Crabbox < v0.12.0 Authentication Bypass via Header Spoofing

Status: published. Published: 2026-05-14. Updated: 2026-11-08.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/openclaw/crabbox/pull/70
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/openclaw/crabbox/commit/b657323f1d1c954cefc8444571fa6c45a8896e7f

## Affected products and versions

- openclaw / crabbox (github.com/openclaw/crabbox): ≥ 0; < 0.12.0 (affected, semver); b657323f1d1c954cefc8444571fa6c45a8896e7f (unaffected, git). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.7 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.36% as of 2026-11-08; percentile 30.15%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-287

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/openclaw/crabbox/releases/tag/v0.12.0 (CNA: VulnCheck; release-notes)

- https://github.com/openclaw/crabbox/pull/70 (CNA: VulnCheck; issue-tracking, patch)

- https://github.com/openclaw/crabbox/commit/b657323f1d1c954cefc8444571fa6c45a8896e7f (CNA: VulnCheck; patch)

- https://www.vulncheck.com/advisories/crabbox-authentication-bypass-via-header-spoofing (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-8621; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-8621; retrieved 2026-11-08; source updated Not reported

Revision: 16a82bf75554297e07d9327e1cd507ef1b3a0fb720d984ade4db7be48d08b127

Canonical: https://y2.dev/cve/CVE-2026-8621

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