JetBrainsCVE-2026-100263
JetBrains YouTrack: cross-site scripting
Medium4.7CVE-2026-100263 · Published Sep 30, 2026
In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| YouTrack Product | < 2026.2.18991 | 2026.2.18991 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-79
More JetBrains advisories
All JetBrains| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 30 | JetBrains YouTrack: cross-site scripting | Medium6.9 | 2026.2.19197 |
| Sep 30 | JetBrains YouTrack: improper authorization | Medium5.9 | 2026.2.19197 |
| Sep 30 | JetBrains YouTrack: improper authorization | High8.9 | 2026.2.19197 |
| Sep 30 | JetBrains YouTrack: improper authorization | Medium4.9 | 2026.2.19197 |
| Sep 30 | JetBrains YouTrack: server-side request forgery | Medium6.5 | 2026.2.19197 |
| Sep 30 | JetBrains YouTrack: missing authorization | Low3.1 | 2026.2.19197 |