CVE-2026-8621
CVE-2026-8621 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v4: 8.7
- EPSS exploit prediction: 0% (28th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-30369
- Weakness: CWE-287
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2026-8621?
- CVE-2026-8621 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-8621 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-8621?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-8621 have an EU (EUVD) identifier?
- Yes. CVE-2026-8621 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30369.
- When was CVE-2026-8621 published?
- CVE-2026-8621 was published on 2026-05-14 and last updated on 2026-06-17.
References
- https://github.com/openclaw/crabbox/commit/b657323f1d1c954cefc8444571fa6c45a8896e7f
- https://github.com/openclaw/crabbox/pull/70
- https://github.com/openclaw/crabbox/releases/tag/v0.12.0
- https://www.vulncheck.com/advisories/crabbox-authentication-bypass-via-header-spoofing
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- CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…
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