Is CVE-2026-49375 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-49375 being exploited in the wild.

How severe is CVE-2026-49375?

Medium severity, with a CVSS score of 6.1, published 29 May 2026.

Which products and versions are affected?

Jetbrains TeamCity Before 2026.1, 2025.11.5.

Is there a fix for CVE-2026-49375?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-49375 attacked?

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

Am I affected by CVE-2026-49375?

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-2026-49375: JetBrains TeamCity reflected XSS in repository download page

CVE-2026-49375 · Severity: medium · CVSS 6.1 · Published 2026-05-29

JetBrains TeamCity, a platform used by software developers to automate the building and testing of code, was found to have a security flaw on its repository download page. This vulnerability could allow an attacker to trick a user into executing malicious scripts in their browser by clicking a specially crafted link. If successful, an attacker could potentially steal session information or perform actions on behalf of the user within the TeamCity interface.

Technologies: Jetbrains TeamCity. Vendors: Jetbrains.

Quick answers

Is CVE-2026-49375 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-49375 being exploited in the wild.
How severe is CVE-2026-49375?: Medium severity, with a CVSS score of 6.1, published 29 May 2026.
Which products and versions are affected?: Jetbrains TeamCity Before 2026.1, 2025.11.5.
Is there a fix for CVE-2026-49375?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-49375 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-49375?: 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 reflected cross-site scripting (XSS) vulnerability exists in JetBrains TeamCity before versions 2026.1 and 2025.11.5. The flaw is located on the repository download page, where user-supplied input is improperly neutralized before being rendered in the web page (CWE-79). An unauthenticated remote attacker can exploit this by enticing a user to visit a malicious URL. Successful exploitation allows the execution of arbitrary JavaScript in the context of the victim's browser session, potentially leading to session hijacking or unauthorized actions. The issue has been addressed in the 2026.1 and 2025.11.5 releases.

Affected products

JetBrains TeamCity Before 2026.1, 2025.11.5

Timeline

2026-05-29: disclosed
2026-05-29: advisory

References

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

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