EUVD-2026-72501
GHSA-cxhf-5fgf-w8g4
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Network-reachable webhook endpoint, no auth or user interaction required; impact is integrity-only (forged webhook events processed), no confidentiality or availability effect.
Primary rating from Vendor (JetBrains).
CVSS VectorVendor: JetBrains
Lifecycle Timeline
3DescriptionCVE.org
In JetBrains YouTrack before 2026.2.18634 iP spoofing via HTTP headers allowed forged Bitbucket webhooks
AnalysisAI
IP spoofing via forged HTTP headers in JetBrains YouTrack before 2026.2.18634 allows unauthenticated remote attackers to bypass Bitbucket webhook source validation, causing YouTrack to process attacker-crafted webhook payloads as if they originated from a legitimate Bitbucket server. The root cause is CWE-291 - reliance on IP address for authentication - specifically trusting client-controlled headers such as X-Forwarded-For to gate webhook acceptance. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Bitbucket webhook integration must be configured and active in the YouTrack instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS score of 3.5 (Low) reflects limited real-world impact: the attacker can cause YouTrack to process a forged webhook event (integrity impact), but cannot directly read data or crash the service. … 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, as documented in 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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Same weakness CWE-291 – Reliance on IP Address for Authentication
View allSame technique Information Disclosure
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External POC / Exploit Code
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