Unauthenticated backup download via shared draft signature
Published Aug 17, 2026 · Updated Aug 18, 2026
Authentication bypass in JetBrains YouTrack allows remote attackers to read database backups via shared draft signatures on affected versions. JetBrains has disclosed only that backup download access can be reached through the shared draft signature path; the public CNA, NVD, and vendor records do not name the specific handler or validation step that wrongly accepts it. Affected builds are before 2025.3.156085, 2026.1.13913, and 2026.2.18112; reachable unpatched instances expose direct confidentiality loss without credentials or user interaction, with the published vector limiting impact to disclosure rather than modification or service interruption.
Summary
What happened
Authentication bypass in JetBrains YouTrack allows remote attackers to read database backups via shared draft signatures on affected versions. JetBrains has disclosed only that backup download access can be reached through the shared draft signature path; the public CNA, NVD, and vendor records do not name the specific handler or validation step that wrongly accepts it. Affected builds are before 2025.3.156085, 2026.1.13913, and 2026.2.18112; reachable unpatched instances expose direct confidentiality loss without credentials or user interaction, with the published vector limiting impact to disclosure rather than modification or service interruption.
The record
- CVE
- CVE-2026-75045
- Published
- Aug 17, 2026
- Updated
- Aug 18, 2026
- Vendor
- JetBrains
- Product
- YouTrack
- Classifications
- CWE-288, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 17, 2026CVE publishedPublication date reported by the CVE source.
- Aug 18, 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 <2025.3.156085, 2026.1.13913, 2026.2.18112
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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