CVE-2026-86478CWE-290

CVE-2026-86478

Critical · published September 7, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
48.3
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00606 · 48.3th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2026-09-07T21:17Z
References (1)
https://www.jetbrains.com/privacy-security/issues-fixed/ · [email protected]
EPSS history
Timeline
  • 09 SEP 03:20Z
    EPSS moved — → 0%
    epss
  • 07 SEP 16:26Z
    In JetBrains YouTrack before 2025.3.161254, 2026.1.14042 improper authentication in YouTrack Helpdesk allowed unauthenticated account takeover via a…
    cvelistv5