CVE-2026-8621

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-14. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
28.3%
KEV
Not listed

Published

May 14, 2026

Last Modified

May 15, 2026

Advisory Details (4)

Auto-updated May 14, 2026
No patch confirmed yet.
generic

Crabbox < v0.12.0 Authentication Bypass via Header Spoofing | Advisories | VulnCheck

https://www.vulncheck.com/advisories/crabbox-authentication-bypass-via-header-spoofing
generic

Release v0.12.0 · openclaw/crabbox · GitHub

https://github.com/openclaw/crabbox/releases/tag/v0.12.0
generic

[security] fix: ignore identity headers for shared token auth by Hinotoi-agent · Pull Request #70 · openclaw/crabbox · GitHub

https://github.com/openclaw/crabbox/pull/70
generic

fix: ignore identity headers for shared token auth · openclaw/crabbox@b657323 · GitHub

https://github.com/openclaw/crabbox/commit/b657323f1d1c954cefc8444571fa6c45a8896e7f

Vendor Advisories for CVE-2026-8621(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/openclaw/crabbox—0.12.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-09 19:10 UTCEPSS rescore
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-04 06:31 UTCEPSS rescore
  13. 2026-07-01 15:07 UTCEPSS rescore
  14. 2026-06-30 23:22 UTCEPSS rescore
  15. 2026-06-29 21:48 UTCEG score recompute
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 11:15 UTCEG score recompute
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-27 22:37 UTCEG score recompute
  21. 2026-06-27 08:36 UTCEG score recompute
  22. 2026-06-27 03:08 UTCEPSS rescore
  23. 2026-06-26 20:21 UTCEG score recompute
  24. 2026-06-25 19:06 UTCEG score recompute
  25. 2026-06-25 13:50 UTCEPSS rescore
Show 68 more
  1. 2026-06-24 14:05 UTCEPSS rescore
  2. 2026-06-23 21:33 UTCEPSS rescore
  3. 2026-06-22 14:25 UTCEPSS rescore
  4. 2026-06-21 14:56 UTCEPSS rescore
  5. 2026-06-21 01:59 UTCEPSS rescore
  6. 2026-06-19 19:26 UTCEPSS rescore
  7. 2026-06-18 17:52 UTCEPSS rescore
  8. 2026-06-17 17:53 UTCEPSS rescore
  9. 2026-06-17 13:47 UTCEG score recompute
  10. 2026-06-16 22:20 UTCEG score recompute
  11. 2026-06-16 17:53 UTCEPSS rescore
  12. 2026-06-15 23:55 UTCEG score recompute
  13. 2026-06-15 17:49 UTCEPSS rescore
  14. 2026-06-15 17:49 UTCEPSS rescore
  15. 2026-06-15 00:00 UTCEG score recompute
  16. 2026-06-14 23:18 UTCEPSS rescore
  17. 2026-06-14 11:44 UTCEG score recompute
  18. 2026-06-13 23:28 UTCEG score recompute
  19. 2026-06-13 23:00 UTCEPSS rescore
  20. 2026-06-12 23:45 UTCEG score recompute
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-12 23:12 UTCEPSS rescore
  23. 2026-06-12 11:30 UTCEG score recompute
  24. 2026-06-11 23:14 UTCEG score recompute
  25. 2026-06-11 14:00 UTCEPSS rescore
  26. 2026-06-11 10:59 UTCEG score recompute
  27. 2026-06-10 22:42 UTCEG score recompute
  28. 2026-06-10 22:19 UTCEPSS rescore
  29. 2026-06-10 13:22 UTCEPSS rescore
  30. 2026-06-10 10:27 UTCEG score recompute
  31. 2026-06-09 22:11 UTCEG score recompute
  32. 2026-06-09 09:56 UTCEG score recompute
  33. 2026-06-08 21:41 UTCEG score recompute
  34. 2026-06-08 14:17 UTCEPSS rescore
  35. 2026-06-08 09:23 UTCEG score recompute
  36. 2026-06-07 21:08 UTCEG score recompute
  37. 2026-06-07 15:25 UTCEPSS rescore
  38. 2026-06-07 08:52 UTCEG score recompute
  39. 2026-06-06 20:37 UTCEG score recompute
  40. 2026-06-06 13:47 UTCEPSS rescore
  41. 2026-06-06 08:21 UTCEG score recompute
  42. 2026-06-05 22:47 UTCEPSS rescore
  43. 2026-06-05 20:06 UTCEG score recompute
  44. 2026-06-05 07:51 UTCEG score recompute
  45. 2026-06-05 06:10 UTCEPSS rescore
  46. 2026-06-04 19:32 UTCEG score recompute
  47. 2026-06-04 13:12 UTCEPSS rescore
  48. 2026-06-04 07:16 UTCEG score recompute
  49. 2026-06-03 19:01 UTCEG score recompute
  50. 2026-06-03 06:45 UTCEG score recompute
  51. 2026-06-02 20:13 UTCEPSS rescore
  52. 2026-06-02 18:30 UTCEG score recompute
  53. 2026-06-02 06:15 UTCEG score recompute
  54. 2026-06-01 18:00 UTCEG score recompute
  55. 2026-06-01 13:52 UTCEPSS rescore
  56. 2026-06-01 05:45 UTCEG score recompute
  57. 2026-05-31 00:16 UTCEPSS rescore
  58. 2026-05-29 13:44 UTCEPSS rescore
  59. 2026-05-28 13:44 UTCEPSS rescore
  60. 2026-05-27 13:40 UTCEPSS rescore
  61. 2026-05-27 13:40 UTCEPSS rescore
  62. 2026-05-26 13:44 UTCEPSS rescore
  63. 2026-05-26 07:18 UTCEPSS rescore
  64. 2026-05-21 22:43 UTCEPSS rescore
  65. 2026-05-20 22:38 UTCEPSS rescore
  66. 2026-05-20 12:13 UTCEG score recompute
  67. 2026-05-20 12:13 UTCGHSA enrichment
  68. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8621?
CVE-2026-8621 is a high vulnerability published on May 14, 2026. 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…
When was CVE-2026-8621 disclosed?
CVE-2026-8621 was first published in the National Vulnerability Database on May 14, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8621 actively exploited?
CVE-2026-8621 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 28.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8621?
CVE-2026-8621 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-8621?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8621, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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