CVE-2026-103491: CWE-639 in JetBrains YouTrack
In JetBrains YouTrack before 2026.2.19422 iDOR in the issue activities API allowed reading restricted issues
AI Analysis
Technical Summary
JetBrains YouTrack before version 2026.2.19422 contains an iDOR vulnerability (CWE-639) in its issue activities API. This flaw allows an attacker with limited privileges to access and read issue data that should be restricted, violating access control policies. The vulnerability is classified as medium severity with a CVSS score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N). There is no indication of known exploits in the wild. The affected versions are all releases prior to 2026.2.19422.
Potential Impact
An attacker with low privileges can read confidential issue information that should be restricted, leading to a confidentiality breach. There is no impact on integrity or availability. This could expose sensitive project or issue data to unauthorized users.
Mitigation Recommendations
Upgrade JetBrains YouTrack to version 2026.2.19422 or later, where this vulnerability is fixed. Since this is not a cloud service, users must apply the update themselves. No other mitigation or temporary fix is indicated.
CVE-2026-103491: CWE-639 in JetBrains YouTrack
Description
In JetBrains YouTrack before 2026.2.19422 iDOR in the issue activities API allowed reading restricted issues
CVSS v3.1
Score 6.5medium
Affected software
JetBrains
YouTrack
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
JetBrains YouTrack before version 2026.2.19422 contains an iDOR vulnerability (CWE-639) in its issue activities API. This flaw allows an attacker with limited privileges to access and read issue data that should be restricted, violating access control policies. The vulnerability is classified as medium severity with a CVSS score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N). There is no indication of known exploits in the wild. The affected versions are all releases prior to 2026.2.19422.
Potential Impact
An attacker with low privileges can read confidential issue information that should be restricted, leading to a confidentiality breach. There is no impact on integrity or availability. This could expose sensitive project or issue data to unauthorized users.
Mitigation Recommendations
Upgrade JetBrains YouTrack to version 2026.2.19422 or later, where this vulnerability is fixed. Since this is not a cloud service, users must apply the update themselves. No other mitigation or temporary fix is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-30T17:07:13.570Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abe7488a43b0b3b89bd1c5e
Added to database: 10/01/2026, 14:56:08 UTC
Last enriched: 10/01/2026, 15:16:38 UTC
Last updated: 10/01/2026, 22:26:01 UTC
Views: 3
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