Quick answers
- Is CVE-2026-49380 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-49380 being exploited in the wild.
- How severe is CVE-2026-49380?
- Low severity, with a CVSS score of 3.1, published 29 May 2026.
- Which products and versions are affected?
- Jetbrains TeamCity before 2026.1.
- Is there a fix for CVE-2026-49380?
- 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-2026-49380 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-49380?
- 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
An open redirect vulnerability (CWE-601) exists in the SAML plugin of JetBrains TeamCity prior to version 2026.1. The flaw is caused by insufficient validation of redirection parameters during the SAML authentication flow. A remote, unauthenticated attacker can exploit this by tricking a user into clicking a specially crafted URL. While the vulnerability does not allow direct data theft, it is a common primitive for phishing attacks or bypassing security controls that rely on domain trust. The issue is resolved in TeamCity version 2026.1.
Affected products
- JetBrains TeamCity before 2026.1
Timeline
- 2026-05-29: disclosed
- 2026-05-29: advisory