What is CVE-2026-49381?

CVE-2026-49381 is a low-severity vulnerability in Jetbrains Teamcity, classified under Cross-site Scripting. CVSS score: 3.4/10. Published 2026-05-29.

How severe is CVE-2026-49381?

Low severity. CVSS v3 base score is 3.4 out of 10.

XSS in Jetbrains Teamcity

CVE-2026-49381

In JetBrains TeamCity before 2026.1 stored XSS on the SAML login page was possible

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-05-29 · last modified 2026-07-22.

CVSS v3 metric

CVSS v3 base score 3.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (19.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Jetbrains Teamcity — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.jetbrains.com/privacy-security/issues-fixed/ (Vendor Advisory)

Frequently asked questions

What is CVE-2026-49381?: CVE-2026-49381 is a low-severity vulnerability in Jetbrains Teamcity, classified under Cross-site Scripting. CVSS score: 3.4/10. Published 2026-05-29.
How severe is CVE-2026-49381?: Low severity. CVSS v3 base score is 3.4 out of 10.