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CVE-2024-27198VulnerabilityPublished Updated

CVE-2024-27198: JetBrains TeamCity · CWE-288

Affects JetBrains TeamCitySource CVE Database V5

0

Exploited in the wild · used in ransomware campaigns · KEV due 28 Mar 2024 · public exploit available (Metasploit, Exploit-DB) · 99% EPSS : upgrade to 2023.11.4 now.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
KEV deadline
 US federal agencies must patch by this date; a sensible deadline for everyone else.
Ransomware
Used in ransomware campaigns
EPSS
99.9% chance of exploitation in 30 days – higher than 99% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2023.11.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 4 Mar 2024

  2. Exploited in the wild: evidence found.

    Listed in CISA KEV 3 days after disclosure

  3. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by JetBrains

    , 12 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. Added to CISA KEV (opens in a new tab)

    exploitation confirmed · ransomware use known

    , 3 days after disclosure

  4. KEV remediation due

    US federal deadline

    , 24 days after disclosure

  5. First Exploit-DB entry (opens in a new tab)

    JetBrains TeamCity 2023.11.4 - Authentication Bypass

    , 1.4 years after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Upgrade org.jetbrains.teamcity/teamcity-server to 2023.11.4.

Affected software

ProductAffectedFixed in
Mavenorg.jetbrains.teamcity/teamcity-serverpkg:maven/org.jetbrains.teamcity/teamcity-serverOther threatsAffected
  • <2023.11.4
Fixed in
  • 2023.11.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

CVE-2024-27198 is a critical authentication bypass vulnerability in JetBrains TeamCity versions prior to 2023.11.4. This flaw, classified under CWE-288, allows unauthenticated attackers to perform administrative actions without proper authorization. The vulnerability has a CVSS v3.1 score of 9.8, indicating a severe risk with network attack vector, no required privileges or user interaction, and full impact on confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the potential for abuse is significant given TeamCity’s role in continuous integration and deployment pipelines. Organizations using affected TeamCity versions should prioritize patching to prevent unauthorized access and potential compromise of build environments. Countries with substantial use of JetBrains TeamCity and strong software development sectors are at higher risk.

References

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