CVE-2026-86486: CWE-306 in JetBrains YouTrack
Description
CVE-2026-86486 is a low-severity vulnerability in JetBrains YouTrack before version 2026.2.18634. The issue involves the generic VCS webhook handler failing open when its secret is blank, which may lead to limited integrity impact. No confidentiality or availability impacts are reported.
CVSS v3.1
Score 3.7low
Affected software
JetBrains
YouTrack
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-306) in JetBrains YouTrack affects versions prior to 2026.2.18634. The generic version control system (VCS) webhook handler does not properly enforce secret validation when the secret is blank, resulting in a failure-open condition. This could allow an attacker to send unauthorized webhook requests that may affect the integrity of the system. The CVSS 3.1 score is 3.7 (low), reflecting network attack vector, high attack complexity, no privileges required, no user interaction, and limited integrity impact.
Potential Impact
The impact is limited to integrity, with no confidentiality or availability impact. An attacker could potentially send unauthorized webhook requests due to the failure-open condition when the secret is blank, but exploitation complexity is high and no known exploits are reported.
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 vendor advisory content is provided, but the affected version range and patch version are clearly stated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:36.018Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9ee859acd9273b49f0e40c
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/15/2026, 01:17:49 UTC
Last updated: 10/21/2026, 13:22:12 UTC
Views: 65
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