EUVD-2026-72503
GHSA-8g79-9363-v5v2
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Network-delivered WebSocket exploit; PR:L for required read-only account; AC:H for crafting the specific bypass payload; I:L for limited whiteboard write; no C or A impact.
Primary rating from Vendor (JetBrains).
CVSS VectorVendor: JetBrains
Lifecycle Timeline
3DescriptionCVE.org
In JetBrains YouTrack before 2026.2.18634 a crafted WebSocket message allowed read-only whiteboard users to modify canvas content
AnalysisAI
Authorization bypass in JetBrains YouTrack's whiteboard feature allows authenticated read-only whiteboard users to modify canvas content they should only be able to view, by sending a crafted WebSocket message. Affected versions are all YouTrack releases before 2026.2.18634. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a valid YouTrack user account with at minimum read-only permission on the target whiteboard - unauthenticated users cannot exploit this. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The overall risk is low. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade JetBrains YouTrack to version 2026.2.18634 or later, which addresses this authorization bypass per the JetBrains security advisory at https://www.jetbrains.com/privacy-security/issues-fixed/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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In JetBrains YouTrack before 2020.5.3123, server-side template injection (SSTI) was possible, which could lead to code e
An SSRF attack was possible on a JetBrains YouTrack server. Rated critical severity (CVSS 9.8), this vulnerability is re
Certain actions could cause privilege escalation for issue attachments in JetBrains YouTrack. Rated critical severity (C
An Insecure Direct Object Reference, with Authorization Bypass through a User-Controlled Key, was possible in JetBrains
A query injection was possible in JetBrains YouTrack. Rated critical severity (CVSS 9.8), this vulnerability is remotely
Unauthenticated database backup disclosure in JetBrains YouTrack before 2025.3.156085, 2026.1.13913, and 2026.2.18112 al
In JetBrains YouTrack before 2021.1.11111, sandboxing in workflows was insufficient. Rated critical severity (CVSS 9.1),
Same weakness CWE-863 – Incorrect Authorization
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External POC / Exploit Code
Leaving vuln.today