CVE-2026-100257: CWE-918 in JetBrains YouTrack
CVE-2026-100257 is a medium severity vulnerability in JetBrains YouTrack before version 2026.2.18991. It involves a server-side request forgery (sSRF) vulnerability via stored XHTML injection during PDF export. The vulnerability allows an attacker with low privileges to induce the server to make unintended requests. The CVSS score is 4.3, indicating limited confidentiality impact and no integrity or availability impact. No known exploits are reported in the wild. The affected versions are all releases prior to 2026.2.18991.
AI Analysis
Technical Summary
JetBrains YouTrack versions prior to 2026.2.18991 are vulnerable to a server-side request forgery (sSRF) caused by stored XHTML injection during the PDF export functionality. This vulnerability (CWE-918) allows an attacker with low privileges to cause the server to perform unintended network requests. The CVSS 3.1 base score is 4.3, reflecting a network attack vector, low attack complexity, requiring low privileges, no user interaction, and limited confidentiality impact without affecting integrity or availability.
Potential Impact
An attacker with low privileges can exploit this vulnerability to cause the YouTrack server to make unauthorized network requests, potentially leading to information disclosure or interaction with internal systems. The impact is limited to confidentiality with no direct integrity or availability effects. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18991. Users should upgrade to this version or later to remediate the vulnerability. Since this is not a cloud service, remediation depends on user action to apply the update. Patch status is confirmed by the version information provided.
CVE-2026-100257: CWE-918 in JetBrains YouTrack
Description
CVE-2026-100257 is a medium severity vulnerability in JetBrains YouTrack before version 2026.2.18991. It involves a server-side request forgery (sSRF) vulnerability via stored XHTML injection during PDF export. The vulnerability allows an attacker with low privileges to induce the server to make unintended requests. The CVSS score is 4.3, indicating limited confidentiality impact and no integrity or availability impact. No known exploits are reported in the wild. The affected versions are all releases prior to 2026.2.18991.
CVSS v3.1
Score 4.3medium
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 versions prior to 2026.2.18991 are vulnerable to a server-side request forgery (sSRF) caused by stored XHTML injection during the PDF export functionality. This vulnerability (CWE-918) allows an attacker with low privileges to cause the server to perform unintended network requests. The CVSS 3.1 base score is 4.3, reflecting a network attack vector, low attack complexity, requiring low privileges, no user interaction, and limited confidentiality impact without affecting integrity or availability.
Potential Impact
An attacker with low privileges can exploit this vulnerability to cause the YouTrack server to make unauthorized network requests, potentially leading to information disclosure or interaction with internal systems. The impact is limited to confidentiality with no direct integrity or availability effects. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A fix is available in JetBrains YouTrack version 2026.2.18991. Users should upgrade to this version or later to remediate the vulnerability. Since this is not a cloud service, remediation depends on user action to apply the update. Patch status is confirmed by the version information provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-25T17:02:03.771Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd2c302a4e24523d2ec2f3
Added to database: 09/30/2026, 15:35:12 UTC
Last enriched: 09/30/2026, 16:18:08 UTC
Last updated: 10/01/2026, 03:42:18 UTC
Views: 12
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