CVE-2026-49377Network attack vector

Sensitive data exposure via default agent parameters

Published May 29, 2026 · Updated May 29, 2026

Sensitive data exposure in JetBrains TeamCity before 2025.11.2 allows remote authenticated users to read data via default agent parameters. TeamCity stores sensitive information in cleartext environment variables exposed through default agent parameters; JetBrains has not disclosed the specific parameters or code path. Low-privileged network access is required, and the published impact is limited to confidential data exposure without integrity changes or service interruption.

CVSS severity4.3
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive data exposure in JetBrains TeamCity before 2025.11.2 allows remote authenticated users to read data via default agent parameters. TeamCity stores sensitive information in cleartext environment variables exposed through default agent parameters; JetBrains has not disclosed the specific parameters or code path. Low-privileged network access is required, and the published impact is limited to confidential data exposure without integrity changes or service interruption.

The record

CVE
CVE-2026-49377
Published
May 29, 2026
Updated
May 29, 2026
Vendor
JetBrains
Product
TeamCity On-Premises
Classifications
CWE-526
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 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 <2025.11.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · TeamCity On-Premisesversion=0 <2025.11.2

Published CVSS scores

4.3JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-526Exposure of Sensitive Information Through Environmental Variables

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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