CVE-2026-49381: CWE-79 in JetBrains TeamCity
CVE-2026-49381 is a stored cross-site scripting (XSS) vulnerability in JetBrains TeamCity versions before 2026.1. The vulnerability exists on the SAML login page, allowing an attacker with high privileges to inject malicious scripts that are stored and later executed in the context of users accessing that page. The CVSS score is 3.4, indicating a low severity impact primarily affecting confidentiality with no direct impact on integrity or availability. No official patch or remediation guidance is currently provided by the vendor, and no known exploits are reported in the wild.
AI Analysis
Technical Summary
This vulnerability (CWE-79) in JetBrains TeamCity allows stored XSS on the SAML login page in versions prior to 2026.1. An attacker with high privileges and requiring user interaction can inject malicious scripts that persist and execute when the page is accessed. The CVSS vector indicates network attack vector, low attack complexity, high privileges required, and user interaction needed, with a limited confidentiality impact and no integrity or availability impact. No patch or official remediation level has been disclosed yet.
Potential Impact
The impact is limited to confidentiality loss due to stored XSS on the SAML login page. There is no direct impact on system integrity or availability. Exploitation requires high privileges and user interaction, reducing the likelihood and severity of attacks. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the SAML login page to trusted users and monitor for suspicious activity. Avoid clicking on untrusted links or inputs on the affected page. Follow updates from JetBrains for any forthcoming patches or mitigations.
CVE-2026-49381: CWE-79 in JetBrains TeamCity
Description
CVE-2026-49381 is a stored cross-site scripting (XSS) vulnerability in JetBrains TeamCity versions before 2026.1. The vulnerability exists on the SAML login page, allowing an attacker with high privileges to inject malicious scripts that are stored and later executed in the context of users accessing that page. The CVSS score is 3.4, indicating a low severity impact primarily affecting confidentiality with no direct impact on integrity or availability. No official patch or remediation guidance is currently provided by the vendor, and no known exploits are reported in the wild.
CVSS v3.1
Score 3.4low
Affected software
pkg:maven/org.jetbrains.teamcity/teamcity-serverRun 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
This vulnerability (CWE-79) in JetBrains TeamCity allows stored XSS on the SAML login page in versions prior to 2026.1. An attacker with high privileges and requiring user interaction can inject malicious scripts that persist and execute when the page is accessed. The CVSS vector indicates network attack vector, low attack complexity, high privileges required, and user interaction needed, with a limited confidentiality impact and no integrity or availability impact. No patch or official remediation level has been disclosed yet.
Potential Impact
The impact is limited to confidentiality loss due to stored XSS on the SAML login page. There is no direct impact on system integrity or availability. Exploitation requires high privileges and user interaction, reducing the likelihood and severity of attacks. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the SAML login page to trusted users and monitor for suspicious activity. Avoid clicking on untrusted links or inputs on the affected page. Follow updates from JetBrains for any forthcoming patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-05-29T18:07:58.810Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a19dc0ee29bf47b50ff8698
Added to database: 05/29/2026, 18:33:50 UTC
Last enriched: 06/05/2026, 21:22:02 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 63
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