CVE-2026-49378: JetBrains TeamCity · Missing Authorization
Affects JetBrains TeamCitySource CVE Database V5
Not known to be exploited · CVSS 4.3 Medium : upgrade to 2026.1 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2026.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade TeamCity and org.jetbrains.teamcity/teamcity-server to 2026.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| JetBrainsTeamCity | Affected
| Fixed in
|
Mavenorg.jetbrains.teamcity/teamcity-serverpkg:maven/org.jetbrains.teamcity/teamcity-serverOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
If you cannot patch yet, restrict access to TeamCity instances to trusted users only and avoid using parameter autocompletion features that may expose sensitive credentials.
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). The CVSS score is 4.3, indicating a low to medium impact primarily affecting confidentiality without impacting integrity or availability.