Auth bypass in Jetbrains Youtrack

CVE-2026-86486

In JetBrains YouTrack before 2026.2.18634 the generic VCS webhook handler failed open when its secret was blank

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-86486: held from 0.002 to 0.003.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-86486?
CVE-2026-86486 is a low-severity vulnerability in Jetbrains Youtrack, classified under Missing Authentication for Critical Function. CVSS score: 3.7/10. Published 2026-09-07.
How severe is CVE-2026-86486?
Low severity. CVSS v3 base score is 3.7 out of 10.