---
id: CVE-2026-118394
title: Gitea OAuth2 userinfo private group disclosure to public-only tokens
summary: >-
  The OAuth2 userinfo endpoint (`/login/oauth/userinfo`) decided whether to
  limit the `groups` claim to public organizations by re-parsing the
  `Authorization` header as an OAuth2 access token instead of using the scope of
  the credential th…
severity: none
cwe:
  - CWE-200
  - CWE-863
vendor: Gitea
product: gitea.dev
affected:
  - gitea.dev >= 1.23.0 < 28.3.0
published: '2026-11-01'
updated: '2026-11-01'
sourceUpdated: '2026-11-01T09:48:49.431Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118394'
references:
  - url: 'https://github.com/go-gitea/gitea/security/advisories/GHSA-q9gm-9c7q-c5hq'
    label: GitHub Security Advisory GHSA-q9gm-9c7q-c5hq
  - url: 'https://github.com/go-gitea/gitea/pull/39690'
    label: 'Fix: go-gitea/gitea pull request #39690'
  - url: 'https://github.com/go-gitea/gitea/pull/39853'
    label: 'Fix backport to release/v28: go-gitea/gitea pull request #39853'
  - url: 'https://blog.gitea.com/release-of-28.3.0/'
    label: Gitea 28.3.0 release announcement
  - url: 'https://github.com/go-gitea/gitea/releases/tag/v28.3.0'
    label: go-gitea/gitea v28.3.0 release
tags:
  - cve.org
epss: 0.00149
epssPercentile: 0.04078
ingestedAt: '2026-11-05T18:28:50.707Z'
---

## Overview

The OAuth2 userinfo endpoint (`/login/oauth/userinfo`) decided whether to limit the `groups` claim to public organizations by re-parsing the `Authorization` header as an OAuth2 access token instead of using the scope of the credential that authenticated the request. When a public-only OAuth2 token was sent as a query parameter or form field, or a public-only personal access token was used, that scope came back empty and the claim listed the token owner's private organizations, teams and concealed memberships. The disclosure is limited to the owner's organization and team names and memberships; no repository content is exposed. The endpoint now uses the scope of the authenticating token.

## Affected

- `gitea.dev >= 1.23.0 < 28.3.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.