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Authentication bypass by spoofing in Jacamar CI

Priority LOW 32CWE-290Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-290.

Summary

Jacamar CI before 0.30.0 does not properly validate jobs run under service accounts. An authenticated CI user with low privileges can generate arbitrary account names, which lets them act as another account. Exploitation requires user interaction and the attack complexity is low.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Insufficient job validation for service accounts in Jacamar CI prior to v0.30.0 allows authenticated CI users to generate arbitrary account names.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00111 1st percentileScored 2026-11-07
Fix Fixed Jacamar CI (Jacamar CI): 0.30.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Jacamar CIJacamar CIbefore 0.30.00.30.0Patch availableCNA
  • Jacamar CI VendorJacamar CI Affected before 0.30.0 Fixed in 0.30.0 Patch available CNA

Remediation

Upgrade Jacamar CI to 0.30.0 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Jacamar CI (Jacamar CI) Fixed in 0.30.0

Timeline

  1. 2026-10-08 Threatist record created from CVE-2026-107589
  2. 2026-10-08 Alias added: GHSA-x75h-475x-5665
  3. 2026-10-09 CISA SSVC decision points changed
  4. 2026-10-09 Priority changed: MEDIUM → LOW

References

Sources