CVE-2026-25846Network attack vector

Access-token disclosure via unredacted Mailbox log entries

Published Feb 9, 2026 · Updated Feb 9, 2026

Sensitive-data exposure in JetBrains YouTrack before 2025.3.119033 allows remote authenticated users to obtain access tokens via Mailbox logs. The Mailbox logging path records access-token values without redaction; JetBrains has not disclosed the responsible function or field path. Low privileges and network reachability are sufficient, and the reported consequence is limited to confidentiality of tokens written to those logs.

CVSS severity6.5
Medium
EPSS probability0.91%
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 YouTrack before 2025.3.119033 allows remote authenticated users to obtain access tokens via Mailbox logs. The Mailbox logging path records access-token values without redaction; JetBrains has not disclosed the responsible function or field path. Low privileges and network reachability are sufficient, and the reported consequence is limited to confidentiality of tokens written to those logs.

The record

CVE
CVE-2026-25846
Published
Feb 9, 2026
Updated
Feb 9, 2026
Vendor
JetBrains
Product
YouTrack
Classifications
CWE-532, CAPEC-215, T1552.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 9, 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 <2025.3.119033

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · YouTrackversion=0 <2025.3.119033

Published CVSS scores

6.5JetBrains s.r.o.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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-532Insertion of Sensitive Information into Log File
CAPEC-215Fuzzing for application mapping
T1552.001Unsecured Credentials: Credentials In Files

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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