CVE-2026-86486: CWE-306 in JetBrains YouTrack
Description
In JetBrains YouTrack before 2026.2.18634 the generic VCS webhook handler failed open when its secret was blank
CVSS v3.1
Score 3.7low
Affected software
pkg:github/jetbrains/YouTrackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In JetBrains YouTrack prior to version 2026.2.18634, the generic version control system (VCS) webhook handler fails to enforce authentication if the secret is left blank. This is classified as CWE-306 (Missing Authentication for Critical Function). The vulnerability allows unauthenticated requests to be accepted by the webhook handler, potentially leading to unauthorized actions. The CVSS 3.1 base score is 3.7 (low severity) with network attack vector, high attack complexity, no privileges required, no user interaction, and limited impact on integrity only.
Potential Impact
The impact is limited to integrity as the webhook handler may accept unauthenticated requests when the secret is blank. There is no confidentiality or availability impact reported. The vulnerability requires network access but has high attack complexity and no privileges or user interaction needed. No known exploits are reported in the wild.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18634. Users should upgrade to this version or later to remediate the vulnerability. No additional mitigation guidance is provided or required beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-rjvc-hh2w-62q5
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86486"]
- Database Specific Severity
- LOW
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9f9115acd9273b49ff2bee
Added to database: 09/08/2026, 04:37:41 UTC
Last enriched: 09/08/2026, 05:08:10 UTC
Last updated: 10/23/2026, 15:12:04 UTC
Views: 79
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