CVE-2026-55632: GoCD is vulnerable to authorization bypass via pipeline structure API
GoCD is a continuous deliver server. From 20.2.0 until 26.1.0, the internal pipeline structure API used for autocompletion while editing pipeline, template, environment, and user-preference configuration returns its users-and-roles mode to regular authenticated users without requiring an administrator role. A lower-privileged user can enumerate configured user names and available role names, which can facilitate attacks against those users. The response does not reveal which roles are assigned to each user, and the endpoint cannot modify data. This issue is fixed in version 26.1.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
GoCDto a version that resolves this vulnerability.Fixed in 26.1.0
Event History
Frequently Asked Questions
Who can exploit this issue?
Any regular authenticated GoCD user with lower privileges can query the affected internal pipeline structure API. Administrator privileges are not required.
What information can an unauthorized user obtain?
The API can expose configured user names and available role names through its users-and-roles mode. It does not disclose which roles are assigned to individual users.
Can this vulnerability be used to change GoCD configuration or other data?
No. The affected endpoint cannot modify data; the impact is limited to enumeration of user and role names.
Are default installations affected?
The provided information identifies affected GoCD versions from 20.2.0 until 26.1.0, but does not state whether the endpoint is enabled or reachable in every default deployment.
What is the remediation?
Upgrade GoCD to version 26.1.0, which fixes the authorization check for this API.