CVE-2026-75046Network attack vectorHinoki check available

Account enumeration via missing search authorization

Published Aug 17, 2026 · Updated Aug 17, 2026

Improper access control in JetBrains YouTrack before 2026.2.18112 allows remote authenticated users to enumerate accounts via user-search requests. JetBrains classifies the flaw as CWE-862, indicating that the users search endpoint does not sufficiently authorize or scope account-search queries before returning matching identities; no deeper code-level locus or patch diff has been published. Any valid account can test for existing usernames and account presence, which supports targeted follow-on activity such as password spraying or phishing, but the published record describes confidentiality impact only.

CVSS severity4.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper access control in JetBrains YouTrack before 2026.2.18112 allows remote authenticated users to enumerate accounts via user-search requests. JetBrains classifies the flaw as CWE-862, indicating that the users search endpoint does not sufficiently authorize or scope account-search queries before returning matching identities; no deeper code-level locus or patch diff has been published. Any valid account can test for existing usernames and account presence, which supports targeted follow-on activity such as password spraying or phishing, but the published record describes confidentiality impact only.

The record

CVE
CVE-2026-75046
Published
Aug 17, 2026
Updated
Aug 17, 2026
Vendor
JetBrains
Product
YouTrack
Classifications
CWE-862, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 17, 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 <2026.2.18112

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · YouTrackversion=0 <2026.2.18112

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 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-862Missing Authorization
T1087Account Discovery

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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