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TI-2026-86011 Aliases CVE-2026-123852GHSA-mv6f-g9w3-f7mc

Incorrect authorization in JetBrains Junie GitHub Action allows code execution

Priority LOW 35CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

JetBrains Junie GitHub Action before 1.8.0 has an incorrect authorization flaw (CWE-863) that lets code run with workflow credentials when fork updates are processed. A remote attacker who can open a pull request from a fork can trigger this without authentication, with high impact to confidentiality and integrity.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

In JetBrains Junie GitHub Action before 1.8.0 code execution with workflow credentials was possible via fork updates

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00376 31st percentileScored 2026-11-07
Fix Fixed Junie GitHub Action (JetBrains): 1.8.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
JetBrainsJunie GitHub Actionbefore 1.8.01.8.0Patch availableCNA
  • Junie GitHub Action VendorJetBrains Affected before 1.8.0 Fixed in 1.8.0 Patch available CNA

Remediation

Update JetBrains Junie GitHub Action to version 1.8.0 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Junie GitHub Action (JetBrains) Fixed in 1.8.0

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-123852
  2. 2026-11-06 CISA SSVC decision points changed
  3. 2026-11-06 Priority changed: MEDIUM → LOW
  4. 2026-11-06 Alias added: GHSA-mv6f-g9w3-f7mc

References

Other 1

  • TI-2026-45031 Deserialization of untrusted data in JetBrains TeamCity KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18053 In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-22884 In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18054 In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible KEVCVSS 3.1HIGH 7.3
  • TI-2024-15905 In JetBrains TeamCity before 2023.11.3 authentication bypass leading to RCE was possible CVSS 3.1CRITICAL 9.8
  • TI-2024-24589 Insufficiently protected credentials in JetBrains IntelliJ IDEA CVSS 3.1CRITICAL 9.3
See all 787 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences