Read the docs
TI-2026-64608 Aliases CVE-2026-100267GHSA-h6p5-g44x-3r85

In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via mailbox regex mail-rule filters

Priority LOW 26CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-1333.

Summary

In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via mailbox regex mail-rule filters

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00286 21st percentileScored 2026-11-07
Fix Fixed YouTrack (JetBrains): 2026.2.19197

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
JetBrainsYouTrackbefore 2026.2.191972026.2.19197Patch availableCNA
  • YouTrack VendorJetBrains Affected before 2026.2.19197 Fixed in 2026.2.19197 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:*before 2026.2.19197VulnerableJetBrains
  • cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:* Versions before 2026.2.19197 Vulnerable ·JetBrains

Remediation

  • Fix · CNA YouTrack (JetBrains) Fixed in 2026.2.19197

Fixed in the same release

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

  • Release ·

    JetBrains YouTrack 2026.2.19197

    14 records Highest priority Priority MEDIUM 2 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2026-64618 In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signaturePriority MEDIUM 43
    • TI-2026-64614 In JetBrains YouTrack before 2026.2.19197 authorisation bypass in the scripts debugger allowed arbitrary code executionPriority MEDIUM 43
    • TI-2026-64609 Authorization bypass in JetBrains YouTrackPriority LOW 33
    Show all 14 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-100267
  2. 2026-10-03 Alias added: GHSA-h6p5-g44x-3r85

References

Advisory 1

  • TI-2026-44538 Missing authentication in JetBrains YouTrack CVSS 3.1CRITICAL 10.0
  • TI-2022-08314 JetBrains YouTrack before 2021.4.40426 was vulnerable to SSTI (Server-Side Template Injection) via FreeMarker templates. CVSS 3.1CRITICAL 9.8
  • TI-2026-52731 Authentication bypass in JetBrains YouTrack CVSS 3.1CRITICAL 9.1
  • TI-2021-07854 In JetBrains YouTrack before 2020.5.3123, server-side template injection (SSTI) was… CVSS 3.1CRITICAL 9.8
  • TI-2021-19197 JetBrains YouTrack before 2021.3.23639 is vulnerable to Host header injection. CVSS 3.1CRITICAL 9.8
  • TI-2019-09636 Certain actions could cause privilege escalation for issue attachments in JetBrains… CVSS 3.0CRITICAL 9.8
See all 156 →

Sources

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