CVE-2026-92138 Jenkins Project CVE debrief

Who should care

Defenders responsible for Jenkins deployments, security teams, and administrators of Bitbucket Server Integration Plugin should assess exposure and apply patches. They should also monitor for suspicious activity related to OAuth flows and verify plugin versions and exposure. Additionally, they should prioritize verifying exposure and applying patches for Jenkins Bitbucket Server Integration Plugin 6.0.1 and earlier, and review compensating controls for Ex.

Why it matters

CVE-2026-92138 is a medium-severity vulnerability in Jenkins Bitbucket Server Integration Plugin that allows attackers to hijack the OAuth flow and obtain an access token on behalf of the victim. Defenders should prioritize verifying exposure, applying patches, and monitoring for suspicious activity related to OAuth flows.

• Potential unauthorized access to Jenkins instances
• Possible lateral movement within Jenkins environments
• Required verification of plugin versions and exposure
• Need for patching or updating vulnerable plugin instances

Technical summary

The OAuth authorization endpoint in Jenkins Bitbucket Server Integration Plugin 6.0.1 and earlier is vulnerable to hijacking. The plugin incorrectly reads the `oauth_callback` URL from the submitted form instead of the server-side stored request token. This allows attackers to hijack the OAuth flow and obtain an access token on behalf of the victim, potentially leading to unauthorized access to Jenkins instances and possible lateral movement within Jenkins environments. Defenders should prioritize verifying exposure and applying patches for Jenkins Bitbucket Server Integration Plugin 6.0.1 and earlier.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Jenkins Bitbucket Server Integration Plugin 6.0.1 and earlier.

Recommended defensive actions

• Verify exposure of Jenkins Bitbucket Server Integration Plugin 6.0.1 and earlier in your environment
• Apply patches or updates provided by the vendor
• Monitor for suspicious activity related to OAuth flows
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Jenkins Bitbucket Server Integration Plugin. The plugin's OAuth authorization endpoint is vulnerable to hijacking, allowing attackers to obtain an access token on behalf of the victim.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.