In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible

Project Subscriptions

Vendors Products
Jetbrains Subscribe
Youtrack Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 10 Nov 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 02 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:*

Thu, 01 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains youtrack
Vendors & Products Jetbrains
Jetbrains youtrack

Wed, 30 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
Title HTML Injection via User‑Agent Header in JetBrains YouTrack

Wed, 30 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: JetBrains

Published:

Updated: 2026-09-30T15:48:39.648Z

Reserved: 2026-09-25T17:02:05.789Z

Link: CVE-2026-100263

cve-icon Vulnrichment

Updated: 2026-09-30T15:42:45.750Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-30T16:16:57.267

Modified: 2026-10-02T20:23:31.353

Link: CVE-2026-100263

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T00:15:14Z

Weaknesses