CVE-2026-49375

Medium

Published: 29 May 2026

Published

29 May 2026

Modified

02 June 2026

KEV Added

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Patch

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CVSS Score v3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Score 0.0013 31.3th percentile

Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-49375 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Jetbrains Teamcity. Its CVSS base score is 6.1 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 31.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-33383

Vulnerability details

In JetBrains TeamCity before 2026.1, 2025.11.5 reflected XSS was possible on the repository download page

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Reflected XSS (CWE-79) in a public-facing TeamCity repository page directly enables exploitation of the application for initial access or client-side script execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1