CVE-2026-86492: CWE-488 in JetBrains YouTrack
Description
In JetBrains YouTrack before 2026.2.18634 a shared token cache allowed cross-tenant theft of GitHub App installation tokens
CVSS v3.1
Score 8.5high
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 versions prior to 2026.2.18634, a shared token cache vulnerability (CVE-2026-86492) permitted cross-tenant theft of GitHub App installation tokens. This issue involves improper isolation of token caches, allowing an attacker with limited privileges to access tokens belonging to other tenants. The vulnerability is classified under CWE-488 (Exposure of Sensitive Information Through Directory Listing or Similar).
Potential Impact
The vulnerability allows an attacker with low privileges to steal GitHub App installation tokens from other tenants, potentially leading to unauthorized access to GitHub resources associated with those tokens. The CVSS score of 8.5 indicates a high severity with network attack vector, low attack complexity, and no user interaction required. The impact includes high confidentiality loss, limited integrity impact, and no availability impact.
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. Since this is not a cloud service, remediation depends on applying the official patch. No additional mitigation steps are indicated in the provided data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-p8f6-44xp-3cp8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86492"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9f9115acd9273b49ff2bf2
Added to database: 09/08/2026, 04:37:41 UTC
Last enriched: 09/08/2026, 04:52:18 UTC
Last updated: 10/22/2026, 01:15:26 UTC
Views: 98
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