Read-only whiteboard modification via improper permission checks
Published Sep 7, 2026 · Updated Sep 8, 2026
Improper authorization in JetBrains YouTrack before 2026.2.18634 allows remote authenticated users with read-only access to alter whiteboard cards. The whiteboard card creation and update paths apply improper permission checks, accepting state-changing requests from read-only accounts. A read-only account is required, and the flaw permits creation or modification of board content rather than broader administrative access.
Summary
What happened
Improper authorization in JetBrains YouTrack before 2026.2.18634 allows remote authenticated users with read-only access to alter whiteboard cards. The whiteboard card creation and update paths apply improper permission checks, accepting state-changing requests from read-only accounts. A read-only account is required, and the flaw permits creation or modification of board content rather than broader administrative access.
The record
- CVE
- CVE-2026-86493
- Published
- Sep 7, 2026
- Updated
- Sep 8, 2026
- Vendor
- JetBrains
- Product
- YouTrack
- Classifications
- CWE-863, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 7, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=0 <2026.2.18634
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
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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