CVE-2026-49376: CWE-863 in JetBrains TeamCity
CVE-2026-49376 is a medium severity vulnerability in JetBrains TeamCity prior to version 2026.1 involving insufficient username validation in the SAML plugin. This weakness corresponds to CWE-863, which relates to improper authorization. The vulnerability could allow unauthorized access or actions due to inadequate validation of usernames during SAML authentication. No official patch or remediation level has been confirmed yet, and there are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability in JetBrains TeamCity's SAML plugin arises from insufficient validation of usernames, classified under CWE-863 (Incorrect Authorization). It affects versions before 2026.1 and has a CVSS 3.1 base score of 6.5, indicating a medium severity level. The issue could lead to limited confidentiality and integrity impacts without requiring user interaction or privileges. No vendor advisory or patch information is currently available, and the product is not a cloud service, so remediation depends on JetBrains releasing an update.
Potential Impact
The vulnerability may allow an attacker to bypass proper authorization checks during SAML authentication, potentially leading to unauthorized access or modification of data with limited confidentiality and integrity impact. There is no indication of availability impact. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor JetBrains advisories for updates. No specific temporary mitigations are documented at this time.
CVE-2026-49376: CWE-863 in JetBrains TeamCity
Description
CVE-2026-49376 is a medium severity vulnerability in JetBrains TeamCity prior to version 2026.1 involving insufficient username validation in the SAML plugin. This weakness corresponds to CWE-863, which relates to improper authorization. The vulnerability could allow unauthorized access or actions due to inadequate validation of usernames during SAML authentication. No official patch or remediation level has been confirmed yet, and there are no known exploits in the wild at this time.
CVSS v3.1
Score 6.5medium
Affected software
pkg:maven/org.jetbrains.teamcity/teamcity-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in JetBrains TeamCity's SAML plugin arises from insufficient validation of usernames, classified under CWE-863 (Incorrect Authorization). It affects versions before 2026.1 and has a CVSS 3.1 base score of 6.5, indicating a medium severity level. The issue could lead to limited confidentiality and integrity impacts without requiring user interaction or privileges. No vendor advisory or patch information is currently available, and the product is not a cloud service, so remediation depends on JetBrains releasing an update.
Potential Impact
The vulnerability may allow an attacker to bypass proper authorization checks during SAML authentication, potentially leading to unauthorized access or modification of data with limited confidentiality and integrity impact. There is no indication of availability impact. No known exploits have been reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should monitor JetBrains advisories for updates. No specific temporary mitigations are documented at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-05-29T18:07:57.110Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a19dc0ee29bf47b50ff8689
Added to database: 05/29/2026, 18:33:50 UTC
Last enriched: 06/05/2026, 21:21:37 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 64
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