What is CVE-2026-49376?

CVE-2026-49376 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-05-29.

How severe is CVE-2026-49376?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Jetbrains Teamcity

CVE-2026-49376

In JetBrains TeamCity before 2026.1 insufficient username validation in the SAML plugin

Vulnerability class: Broken Access Control

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.9% 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-863 — Incorrect Authorization

References

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

Frequently asked questions

What is CVE-2026-49376?: CVE-2026-49376 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-05-29.
How severe is CVE-2026-49376?: Medium severity. CVSS v3 base score is 6.5 out of 10.