CVE-2026-28194Network attack vector

Unauthenticated open redirect via project creation flow

Published Feb 25, 2026 · Updated Feb 25, 2026

Open redirect in JetBrains TeamCity before 2025.11.3 allows remote attackers to send users to an untrusted site through project creation. JetBrains identifies the React project creation flow as the locus but has not disclosed the affected route, parameter, or validation failure. Exploitation is unauthenticated but requires a user to follow a crafted link; the redirect sends the browser from a trusted TeamCity origin to an attacker-selected site, causing limited confidentiality loss.

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

What happened

Open redirect in JetBrains TeamCity before 2025.11.3 allows remote attackers to send users to an untrusted site through project creation. JetBrains identifies the React project creation flow as the locus but has not disclosed the affected route, parameter, or validation failure. Exploitation is unauthenticated but requires a user to follow a crafted link; the redirect sends the browser from a trusted TeamCity origin to an attacker-selected site, causing limited confidentiality loss.

The record

CVE
CVE-2026-28194
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
JetBrains
Product
TeamCity On-Premises
Classifications
CWE-601, CAPEC-178, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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 <2025.11.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JetBrains · TeamCity On-Premisesversion=0 <2025.11.3

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
CAPEC-178Cross-Site Flashing
T1566.002Spearphishing Link

Public exploit references

No public exploit references are available in this record.

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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