EUVD-2026-72502
GHSA-rjvc-hh2w-62q5
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
AC:H reflects the blank-secret prerequisite (non-default config); I:L captures limited webhook-trigger integrity impact; C:N and A:N because no data is read and no disruption occurs.
Primary rating from Vendor (JetBrains).
CVSS VectorVendor: JetBrains
Lifecycle Timeline
2DescriptionCVE.org
In JetBrains YouTrack before 2026.2.18634 the generic VCS webhook handler failed open when its secret was blank
AnalysisAI
The generic VCS webhook handler in JetBrains YouTrack before 2026.2.18634 fails open when no webhook secret is configured, allowing unauthenticated remote callers to trigger webhook processing without any valid credential check. This CWE-306 flaw means that deployments where the webhook secret field is intentionally or inadvertently left blank accept all inbound webhook payloads as legitimate, bypassing the shared-secret verification mechanism. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target YouTrack instance has the VCS webhook secret field left blank - any non-empty configured secret renders the endpoint immune to this flaw. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 3.7 (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N) is well-calibrated for this flaw. … 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 resolves the fail-open behavior in the VCS webhook handler; the fix is documented in the vendor advisory at https://www.jetbrains.com/privacy-security/issues-fixed/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Authentication Bypass
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External POC / Exploit Code
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