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TI-2026-85864 Aliases CVE-2026-123323GHSA-mf3r-rhrx-xp7c

Improper URL validation in JetBrains YouTrack app widget host

Priority LOW 36CWE-862Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

JetBrains YouTrack before 2025.3.170763, 2026.1.14150 and 2026.2.19656 is affected. Improper URL validation in the app widget host lets apps send REST requests without user confirmation, which is a missing authorization check (CWE-862). An attacker with high privileges needs a user to interact with the flaw, and it can have high impact on confidentiality, integrity and availability.

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

Description from the CNA

In JetBrains YouTrack before 2025.3.170763, 2026.1.14150, 2026.2.19656 improper URL validation in the app widget host allowed apps to send REST requests without user confirmation

Why it matters now

EPSS 0.0028 20th percentileScored 2026-11-07
Fix Fixed YouTrack (JetBrains): 2025.3.170763, 2026.1.14150, 2026.2.19656

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JetBrainsYouTrackbefore 2025.3.170763, 2026.1.14150, 2026.2.196562025.3.170763, 2026.1.14150, 2026.2.19656Patch availableCNA
  • YouTrack VendorJetBrains Affected before 2025.3.170763, 2026.1.14150, 2026.2.19656 Fixed in 2025.3.170763, 2026.1.14150, 2026.2.19656 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:*——JetBrains
  • cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:* Versions — — ·JetBrains

Remediation

Update JetBrains YouTrack to 2025.3.170763, 2026.1.14150 or 2026.2.19656.

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

  • Fix · CNA YouTrack (JetBrains) Fixed in 2025.3.170763, 2026.1.14150, 2026.2.19656

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    JetBrains YouTrack 2025.3.170763, 2026.1.14150, 2026.2.19656

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-85866 Untrusted remote code inclusion in JetBrains YouTrack plugin sandboxPriority LOW 33
    Show all 2 records →

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-123323
  2. 2026-11-06 Alias added: GHSA-mf3r-rhrx-xp7c
  3. 2026-11-08 Priority changed: MEDIUM → LOW

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