CVE-2026-49378: CWE-862 in JetBrains TeamCity
CVE-2026-49378 is a medium severity vulnerability in JetBrains TeamCity before version 2026.1 where credential parameters were exposed through parameter autocompletion. This exposure could allow users with limited privileges to see sensitive credential information unintentionally. The vulnerability is classified under CWE-862 (Missing Authorization). There is no official patch or remediation level confirmed yet, and no known exploits in the wild have been reported. The CVSS score is 4.3, indicating a low to medium impact primarily affecting confidentiality without impacting integrity or availability.
AI Analysis
Technical Summary
This vulnerability in JetBrains TeamCity involves improper authorization controls that cause credential parameters to be exposed via the parameter autocompletion feature. Specifically, before version 2026.1, users with some level of access could see sensitive credential data that should have been protected. The issue is categorized as CWE-862, indicating missing authorization checks. The CVSS 3.1 score of 4.3 reflects a network attack vector with low complexity and no user interaction required, but limited confidentiality impact and no integrity or availability impact. No patch or official remediation guidance has been provided yet by the vendor.
Potential Impact
The vulnerability allows unauthorized exposure of credential parameters through autocompletion, potentially leaking sensitive information to users who should not have access. However, the impact is limited to confidentiality with no reported integrity or availability consequences. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to TeamCity instances to trusted users only and avoid using parameter autocompletion features that may expose sensitive credentials. Monitor official JetBrains communications for updates on patches or mitigations.
CVE-2026-49378: CWE-862 in JetBrains TeamCity
Description
CVE-2026-49378 is a medium severity vulnerability in JetBrains TeamCity before version 2026.1 where credential parameters were exposed through parameter autocompletion. This exposure could allow users with limited privileges to see sensitive credential information unintentionally. The vulnerability is classified under CWE-862 (Missing Authorization). There is no official patch or remediation level confirmed yet, and no known exploits in the wild have been reported. The CVSS score is 4.3, indicating a low to medium impact primarily affecting confidentiality without impacting integrity or availability.
CVSS v3.1
Score 4.3medium
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 involves improper authorization controls that cause credential parameters to be exposed via the parameter autocompletion feature. Specifically, before version 2026.1, users with some level of access could see sensitive credential data that should have been protected. The issue is categorized as CWE-862, indicating missing authorization checks. The CVSS 3.1 score of 4.3 reflects a network attack vector with low complexity and no user interaction required, but limited confidentiality impact and no integrity or availability impact. No patch or official remediation guidance has been provided yet by the vendor.
Potential Impact
The vulnerability allows unauthorized exposure of credential parameters through autocompletion, potentially leaking sensitive information to users who should not have access. However, the impact is limited to confidentiality with no reported integrity or availability consequences. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to TeamCity instances to trusted users only and avoid using parameter autocompletion features that may expose sensitive credentials. Monitor official JetBrains communications for updates on patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-05-29T18:07:57.737Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a19dc0ee29bf47b50ff868f
Added to database: 05/29/2026, 18:33:50 UTC
Last enriched: 06/05/2026, 21:21:51 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 60
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.