What’s Vulnerable › Vulnerabilities

CVE-2026-86478

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-07 · updated 2026-09-09
• Weakness: CWE-290

Description

In JetBrains YouTrack before 2025.3.161254, 2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a self-asserted email address

Affected products

• JetBrains YouTrack: before 2025.3.161254, 2026.1.14042 — fixed in 2026.1.14042, 2025.3.161254

How to fix

Upgrade to a fixed version: JetBrains YouTrack 2026.1.14042, 2025.3.161254. Check the vendor advisory for mitigations.

References

• https://www.jetbrains.com/privacy-security/issues-fixed/

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