JetBrainsCVE-2026-100267
JetBrains YouTrack: regular expression denial of service
Medium5.9CVE-2026-100267 · Published Sep 30, 2026 · updated Oct 1, 2026
In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via mailbox regex mail-rule filters
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| YouTrack Product | < 2026.2.19197 | 2026.2.19197 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-1333
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 |