CVE-2024-27199

JetBrains TeamCity Relative Path Traversal Vulnerability

Exploited in attacks Used by ransomware High 7.3 Attack chance: >99.9%

What it is

In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible

CISA: JetBrains TeamCity contains a relative path traversal vulnerability that could allow limited admin actions to be performed.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Deadline for US federal agencies: May 4, 2026

Added to the CISA list: April 20, 2026
Published: March 4, 2024
Severity: High 7.3 CVSS 3.1
Chance of attacks in the next 30 days (EPSS): >99.9% in the top 0.1% of all known vulnerabilities
Weakness: CWE-23
More details: NVD · CVE.org · CISA

All references (2)

More exploited flaws from JetBrains

Added	Vulnerability	Product	Severity	Attack chance
Aug 5, 2026	Deserialization of Untrusted DataCVE-2026-63077used by ransomware	TeamCity	Critical 9.8	94%
Mar 7, 2024	Authentication BypassCVE-2024-27198used by ransomware	TeamCity	Critical 9.8	99.9%
Oct 4, 2023	Authentication BypassCVE-2023-42793used by ransomware	TeamCity	Critical 9.8	>99.9%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.