Authentication bypass by spoofing in Jacamar CI
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
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Jacamar CI | Jacamar CI | before 0.30.0 | 0.30.0 | Patch available | CNA |
- 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
- 2026-10-08 Threatist record created from CVE-2026-107589
- 2026-10-08 Alias added: GHSA-x75h-475x-5665
- 2026-10-09 CISA SSVC decision points changed
- 2026-10-09 Priority changed: MEDIUM → LOW
Sources
- CVE-2026-107589 · CVE Program
- CVE-2026-107589 · NVD
- FIRST EPSS
- GHSA-x75h-475x-5665 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences