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- 1High-severity JetBrains YouTrack flaw enables account takeoverโ๐จ EUVD-2026-90021 ๐ Score: 8.9/10 (CVSS v3.1) ๐ฆ Product: YouTrack ๐ข Vendor: JetBrains ๐ Published: 2026-09-30 | Updated:
A newly published vulnerability, EUVD-2026-90021, affects JetBrains YouTrack before version 2026.2.19197 and carries a CVSS score of 8.9. Attackers could take over accounts by replaying a notification signature. JetBrains has issued a fix, and security teams are urged to update their YouTrack instances promptly to close the hole.