Description
In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via mailbox regex mail-rule filters
Affected products
jetbrains: youtrack
References1
- www.jetbrains.com/privacy-security/issues-fixed/ Vendor Advisory
Metrics
- CVSS 3.1
-
5.9
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 21 · as of 10 November 2026
- CWE
- CWE-1333
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.