Mmastodon TechnologyCybersecurity first seen 15 h ago, last 15 h ago, peak #12

High-severity JetBrains YouTrack flaw enables account takeover

Original: 🚨 EUVD-2026-90021 📊 Score: 8.9/10 (CVSS v3.1) 📦 Product: YouTrack 🏢 Vendor: JetBrains 📅 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.

Why now: Security teams are discussing the newly published high-severity flaw so they can patch affected YouTrack deployments.

JetBrainsYouTrackEUVD-2026-90021

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Evidence

• 🚨 EUVD-2026-90021 📊 Score: 8.9/10 (CVSS v3.1) 📦 Product: YouTrack 🏢 Vendor: JetBrains 📅 Published: 2026-09-30 | Updated: 2026-10-01 📝 In JetBrains YouTrack before 2026.2.19197 account takeover was possible by replaying a notification signature 🔗 https://… · EUVD_Bot

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