CVE-2026-86492: CWE-488 in JetBrains YouTrack
CVE-2026-86492 is a high severity vulnerability in JetBrains YouTrack where a shared token cache allowed cross-tenant theft of GitHub App installation tokens. This issue affects versions before 2026.2.18634. The vulnerability could lead to unauthorized access to sensitive GitHub tokens across tenants.
AI Analysis
Technical Summary
This vulnerability (CWE-488) in JetBrains YouTrack involves a shared token cache that improperly isolates GitHub App installation tokens, enabling cross-tenant token theft. The flaw exists in versions prior to 2026.2.18634. The CVSS 3.1 score is 8.5, indicating high severity with network attack vector, low attack complexity, requiring low privileges but no user interaction, and resulting in high confidentiality impact, limited integrity impact, and no availability impact.
Potential Impact
An attacker with low privileges could remotely exploit this vulnerability to steal GitHub App installation tokens from other tenants, leading to unauthorized access to sensitive GitHub resources. The confidentiality impact is high, potentially exposing sensitive data. Integrity impact is limited, and availability is not affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is currently available. Until a fix is released, monitor vendor communications for updates.
CVE-2026-86492: CWE-488 in JetBrains YouTrack
Description
CVE-2026-86492 is a high severity vulnerability in JetBrains YouTrack where a shared token cache allowed cross-tenant theft of GitHub App installation tokens. This issue affects versions before 2026.2.18634. The vulnerability could lead to unauthorized access to sensitive GitHub tokens across tenants.
CVSS v3.1
Score 8.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-488) in JetBrains YouTrack involves a shared token cache that improperly isolates GitHub App installation tokens, enabling cross-tenant token theft. The flaw exists in versions prior to 2026.2.18634. The CVSS 3.1 score is 8.5, indicating high severity with network attack vector, low attack complexity, requiring low privileges but no user interaction, and resulting in high confidentiality impact, limited integrity impact, and no availability impact.
Potential Impact
An attacker with low privileges could remotely exploit this vulnerability to steal GitHub App installation tokens from other tenants, leading to unauthorized access to sensitive GitHub resources. The confidentiality impact is high, potentially exposing sensitive data. Integrity impact is limited, and availability is not affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is currently available. Until a fix is released, monitor vendor communications for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:37.497Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9ee859acd9273b49f0e41a
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/07/2026, 16:52:35 UTC
Last updated: 09/08/2026, 01:20:05 UTC
Views: 11
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