CVE-2026-86485: CWE-291 in JetBrains YouTrack
CVE-2026-86485 is a low-severity vulnerability in JetBrains YouTrack before version 2026.2.18634. It involves IP spoofing via HTTP headers that allows forged Bitbucket webhooks to be accepted by the system. The vulnerability is related to improper authentication of webhook requests, categorized under CWE-291 (Improper Authentication). No official patch or remediation guidance has been provided yet.
AI Analysis
Technical Summary
This vulnerability in JetBrains YouTrack allows an attacker to spoof IP addresses in HTTP headers, enabling the acceptance of forged Bitbucket webhook requests. The flaw is due to improper authentication mechanisms that fail to validate the source of webhook requests correctly. The CVSS 3.1 base score is 3.5, indicating low severity, with the attack vector being local (AV:L), low complexity (AC:L), no privileges required (PR:N), and requiring user interaction (UI:R). The impact is limited to confidentiality with no integrity or availability impact.
Potential Impact
The vulnerability allows an attacker to send forged Bitbucket webhook requests by spoofing IP addresses in HTTP headers. This could lead to unauthorized webhook processing, potentially exposing some confidential information. However, there is no indication of integrity or availability impact. The overall impact is limited and rated as low severity.
Mitigation Recommendations
No official patch or remediation level has been published by JetBrains at this time. Patch status is not yet confirmed—check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution with webhook configurations and monitor for unusual webhook activity.
CVE-2026-86485: CWE-291 in JetBrains YouTrack
Description
CVE-2026-86485 is a low-severity vulnerability in JetBrains YouTrack before version 2026.2.18634. It involves IP spoofing via HTTP headers that allows forged Bitbucket webhooks to be accepted by the system. The vulnerability is related to improper authentication of webhook requests, categorized under CWE-291 (Improper Authentication). No official patch or remediation guidance has been provided yet.
CVSS v3.1
Score 3.5low
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in JetBrains YouTrack allows an attacker to spoof IP addresses in HTTP headers, enabling the acceptance of forged Bitbucket webhook requests. The flaw is due to improper authentication mechanisms that fail to validate the source of webhook requests correctly. The CVSS 3.1 base score is 3.5, indicating low severity, with the attack vector being local (AV:L), low complexity (AC:L), no privileges required (PR:N), and requiring user interaction (UI:R). The impact is limited to confidentiality with no integrity or availability impact.
Potential Impact
The vulnerability allows an attacker to send forged Bitbucket webhook requests by spoofing IP addresses in HTTP headers. This could lead to unauthorized webhook processing, potentially exposing some confidential information. However, there is no indication of integrity or availability impact. The overall impact is limited and rated as low severity.
Mitigation Recommendations
No official patch or remediation level has been published by JetBrains at this time. Patch status is not yet confirmed—check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution with webhook configurations and monitor for unusual webhook activity.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-07T16:13:35.720Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9ee859acd9273b49f0e40a
Added to database: 09/07/2026, 16:37:45 UTC
Last enriched: 09/07/2026, 16:55:01 UTC
Last updated: 09/08/2026, 01:52:05 UTC
Views: 10
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