JetBrains TeamCity up to 2026.1.0 cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in JetBrains TeamCity up to 2026.1.0. This issue affects some unknown processing. Executing a manipulation can lead to cross site scripting. This vulnerability is registered as CVE-2026-49371. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in JetBrains TeamCity up to 2026.1.0. It has been declared as problematic. This vulnerability affects an unknown function. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

In JetBrains TeamCity before 2026.1.1 reflected XSS in the keyword filter was possible

The advisory is shared for download at jetbrains.com. This vulnerability was named CVE-2026-49371 since 05/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 2026.1.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1758). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • JetBrains TeamCity

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (JetBrains): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: TeamCity 2026.1.1

Timelineinfo

05/29/2026 Advisory disclosed
05/29/2026 +0 days CVE reserved
05/29/2026 +0 days VulDB entry created
06/02/2026 +4 days VulDB entry last update

Sourcesinfo

Advisory: jetbrains.com
Status: Confirmed

CVE: CVE-2026-49371 (🔒)
GCVE (CVE): GCVE-0-2026-49371
GCVE (VulDB): GCVE-100-367360
CERT Bund: WID-SEC-2026-1758 - JetBrains TeamCity: Mehrere Schwachstellen

Entryinfo

Created: 05/29/2026 21:48
Updated: 06/02/2026 02:18
Changes: 05/29/2026 21:48 (64), 06/02/2026 02:18 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

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