CVE-2026-49376: JetBrains TeamCity · Incorrect Authorization
Affects JetBrains TeamCitySource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium : upgrade to 2026.1 when convenient.
Data as of 29 Oct 2026, 19:04 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:N/UI:N/S:U/C:L/I:L/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 29 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
No specific temporary mitigations are documented at this time.
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.