Is CVE-2026-49374 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-49374 being exploited in the wild.

How severe is CVE-2026-49374?

High severity, with a CVSS score of 7.6, published 29 May 2026.

Which products and versions are affected?

Jetbrains TeamCity before 2026.1.

Is there a fix for CVE-2026-49374?

A patch was published on 2026-05-29: Fixed in version 2026.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-49374 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-49374?

Check whether you run Jetbrains TeamCity at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-49374: JetBrains TeamCity improper permission checks in build configuration

CVE-2026-49374 · Severity: high · CVSS 7.6 · Published 2026-05-29

JetBrains TeamCity, a platform used by software teams to automate the building and testing of code, contained a security flaw that allowed unauthorized users to view sensitive build configuration parameters. These parameters often contain internal environment details or secrets required for the software development process. An attacker with low-level access to the system could exploit this to gain information that should be restricted, potentially compromising the integrity of the software delivery pipeline.

Technologies: Jetbrains TeamCity. Vendors: Jetbrains.

Quick answers

Is CVE-2026-49374 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-49374 being exploited in the wild.
How severe is CVE-2026-49374?: High severity, with a CVSS score of 7.6, published 29 May 2026.
Which products and versions are affected?: Jetbrains TeamCity before 2026.1.
Is there a fix for CVE-2026-49374?: A patch was published on 2026-05-29: Fixed in version 2026.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-49374 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-49374?: Check whether you run Jetbrains TeamCity at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A missing authorization vulnerability (CWE-862) exists in JetBrains TeamCity versions prior to 2026.1. The flaw is rooted in improper permission checks within the build configuration component, which fails to correctly restrict access to configuration parameters. A remote attacker with basic authenticated access (low privileges) can exploit this over the network without any user interaction. Successful exploitation allows the attacker to read sensitive build parameters, which may lead to further information disclosure or unauthorized modifications to the build environment. The issue is resolved in TeamCity version 2026.1.

Affected products

JetBrains TeamCity before 2026.1

Timeline

2026-05-29: advisory: CVE-2026-49374 published by JetBrains
2026-05-29: patched: Fixed in version 2026.1

References

https://www.jetbrains.com/privacy-security/issues-fixed/

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