CVE-2024-27199Known exploitationPublic exploitNetwork attack vector

Authentication bypass via traversal in public resource paths

Published Mar 4, 2024 · Updated Apr 21, 2026

Path traversal in JetBrains TeamCity On-Premises before 2023.11.4 allows remote attackers to bypass authentication via crafted URLs. Public resource handlers accept double-dot segments and route the normalized path to protected JSP and servlet endpoints without enforcing their authentication checks. Any remote attacker with HTTP(S) access can read limited diagnostic data or alter limited HTTPS settings, including the certificate and listening port.

CVSS severity7.3
High
EPSS probability99.99%
Next 30 days · Nov 1, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in JetBrains TeamCity On-Premises before 2023.11.4 allows remote attackers to bypass authentication via crafted URLs. Public resource handlers accept double-dot segments and route the normalized path to protected JSP and servlet endpoints without enforcing their authentication checks. Any remote attacker with HTTP(S) access can read limited diagnostic data or alter limited HTTPS settings, including the certificate and listening port.

The record

CVE
CVE-2024-27199
Published
Mar 4, 2024
Updated
Apr 21, 2026
Vendor
JetBrains
Product
TeamCity
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2023.11.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JetBrains · TeamCityversion=0 <2023.11.4

Published CVSS scores

7.3Rapid7CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsShadowserver observations through Sep 28, 2026. Gaps indicate unavailable data.
Sep 22, 2026Sep 28, 2026
View daily counts
Reporting dayUnique IPs
Sep 22, 20261
Sep 23, 20261
Sep 24, 20261
Sep 25, 20262
Sep 26, 20262
Sep 27, 20261
Sep 28, 20261
Latest reporting daySep 28, 2026
Latest daily unique IPs1
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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