CVE-2026-86488Network attack vector

Authenticated saved-search disclosure via unchecked object references

Published Sep 7, 2026 · Updated Sep 8, 2026

Insecure direct object reference in JetBrains YouTrack before 2026.2.18634 allows remote authenticated users to read private saved searches. The watchRules and issueListConfig endpoints resolve user-controlled object references without enforcing ownership before returning saved-search data. A low-privileged account and network access are required; the published impact is disclosure only, with no integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure direct object reference in JetBrains YouTrack before 2026.2.18634 allows remote authenticated users to read private saved searches. The watchRules and issueListConfig endpoints resolve user-controlled object references without enforcing ownership before returning saved-search data. A low-privileged account and network access are required; the published impact is disclosure only, with no integrity or availability impact.

The record

CVE
CVE-2026-86488
Published
Sep 7, 2026
Updated
Sep 8, 2026
Vendor
JetBrains
Product
YouTrack
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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 <2026.2.18634

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JetBrains · YouTrackversion=0 <2026.2.18634

Published CVSS scores

6.5JetBrainsCVSS: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.

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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-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

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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