Integrity loss via websandbox bridge prototype pollution
Published Jun 26, 2026 · Updated Jun 26, 2026
Prototype pollution in the websandbox bridge in JetBrains YouTrack before 2026.2.16593 allows remote authenticated users to cause integrity loss. JetBrains identifies the bridge but has not disclosed the affected function, input path, or unsafe operation that modifies object prototype attributes. Exploitation requires a network-reachable authenticated account, high-complexity conditions, and user interaction; the published vendor impact is limited to integrity.
Summary
What happened
Prototype pollution in the websandbox bridge in JetBrains YouTrack before 2026.2.16593 allows remote authenticated users to cause integrity loss. JetBrains identifies the bridge but has not disclosed the affected function, input path, or unsafe operation that modifies object prototype attributes. Exploitation requires a network-reachable authenticated account, high-complexity conditions, and user interaction; the published vendor impact is limited to integrity.
The record
- CVE
- CVE-2026-57926
- Published
- Jun 26, 2026
- Updated
- Jun 26, 2026
- Vendor
- JetBrains
- Product
- YouTrack
- Classifications
- CWE-1321
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 26, 2026CVE publishedPublication date reported by the CVE source.
- Jun 26, 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 <2026.2.16593
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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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