CVE-2026-86485: CWE-291 in JetBrains YouTrack
Description
In JetBrains YouTrack before 2026.2.18634 iP spoofing via HTTP headers allowed forged Bitbucket webhooks
CVSS v3.1
Score 3.5low
Affected software
pkg:github/jetbrains/YouTrackRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86485 is an IP spoofing vulnerability in JetBrains YouTrack prior to version 2026.2.18634. The issue arises from insufficient validation of HTTP headers used to identify the source IP address, allowing an attacker to forge Bitbucket webhook requests. This could potentially lead to unauthorized webhook processing based on spoofed IP addresses. The CVSS v3.1 base score is 3.3, indicating low severity, with attack vector local, low complexity, no privileges required, and user interaction needed. The vulnerability is categorized under CWE-291 (Improper Authentication).
Potential Impact
The impact is limited to the potential acceptance of forged Bitbucket webhook requests due to IP spoofing via HTTP headers. This could allow an attacker to trigger webhook actions that YouTrack would otherwise only accept from trusted Bitbucket sources. The confidentiality, integrity, and availability impacts are low or negligible as per the CVSS score and description.
Mitigation Recommendations
A fixed version 2026.2.18634 of JetBrains YouTrack is available that addresses this IP spoofing vulnerability. Users should upgrade to version 2026.2.18634 or later to remediate this issue. No additional mitigation steps are indicated or required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-cxhf-5fgf-w8g4
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-86485"]
- Database Specific Severity
- LOW
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9f9115acd9273b49ff2bfc
Added to database: 09/08/2026, 04:37:41 UTC
Last enriched: 09/08/2026, 04:53:49 UTC
Last updated: 10/22/2026, 01:15:26 UTC
Views: 79
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