CVE-2026-86478 Auth bypass in YouTrack
Unauthenticated attackers can take over accounts in JetBrains YouTrack Helpdesk by asserting arbitrary email addresses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86478?
CVE-2026-86478 is a critical authentication bypass vulnerability in JetBrains YouTrack, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Weakness: CWE-290
Which versions are affected by CVE-2026-86478?
How do I fix CVE-2026-86478?
No fix has been published for CVE-2026-86478 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-86478 being exploited?
There is no known exploitation of CVE-2026-86478 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-w44j-qc22-m82h.