Jenkins Project Bitbucket Server Integration Plugin up to 6.0.1 OAuth Authorization Endpoint oauth_callback improper authorization

Summaryinfo

A vulnerability categorized as critical has been discovered in Jenkins Project Bitbucket Server Integration Plugin up to 6.0.1. This affects an unknown part of the component OAuth Authorization Endpoint. The manipulation of the argument oauth_callback results in improper authorization. This vulnerability is cataloged as CVE-2026-92138. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Jenkins Project Bitbucket Server Integration Plugin up to 6.0.1. It has been classified as critical. Affected is an unknown functionality of the component OAuth Authorization Endpoint. The manipulation of the argument oauth_callback with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The OAuth authorization endpoint in Jenkins Bitbucket Server Integration Plugin 6.0.1 and earlier reads the `oauth_callback` URL from the submitted form rather than from the server-side stored request token, allowing attackers to hijack the OAuth flow and obtain an access token on behalf of the victim.

The advisory is shared for download at jenkins.io. This vulnerability is traded as CVE-2026-92138 since 09/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/16/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Continuous Integration Software

Vendor

• Jenkins Project

Name

• Bitbucket Server Integration Plugin

Version

• 6.0.0
• 6.0.1

License

• open-source

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