CVE-2026-44413Network attack vector

Authenticated exposure of server API to unauthorized users

Published May 11, 2026 · Updated May 11, 2026

Missing authentication in JetBrains TeamCity On-Premises 2025.11.4 and earlier allows remote authenticated users to expose server API access. JetBrains has not published the faulty code path or the operation that exposes API endpoints to unauthorized users. Exploitation requires a TeamCity account and either inbound access on nonstandard ports or a build agent colocated with the server.

CVSS severity8.2
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in JetBrains TeamCity On-Premises 2025.11.4 and earlier allows remote authenticated users to expose server API access. JetBrains has not published the faulty code path or the operation that exposes API endpoints to unauthorized users. Exploitation requires a TeamCity account and either inbound access on nonstandard ports or a build agent colocated with the server.

The record

CVE
CVE-2026-44413
Published
May 11, 2026
Updated
May 11, 2026
Vendor
JetBrains
Product
TeamCity On-Premises
Classifications
CWE-306, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 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 <2026.1 2025.11.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · TeamCity On-Premisesversion=0 <2026.1 2025.11.5

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.2JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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