GHSA-PRR9-9MP4-5GP2

Vulnerability from github – Published: 2026-07-21 21:49 – Updated: 2026-07-21 21:49
VLAI
Summary
Gitea: Private org member list leaked via /members API endpoint — incomplete fix for PR #38145
Details

Summary

PR #38145 fixed ListPublicMembers and IsPublicMember but missed ListMembers. Any authenticated user can enumerate ALL members (not just public ones) of a private organization.

Affected Versions

<= v1.26.4 (latest) and main branch

Root Cause

routers/api/v1/org/member.go — ListMembers():

// Missing check: if !organization.HasOrgOrUserVisible(ctx, ctx.Org.Organization.AsUser(), ctx.Doer) { ctx.APIErrorNotFound() return }

Proof of Concept

Setup: privateorg (private), alice = member, bob = outsider

Bob lists ALL members of private org

curl -s "http://gitea/api/v1/orgs/privateorg/members" \ -H "Authorization: token BOB_TOKEN"

Result: HTTP 200

[{"login":"alice","email":"alice@test.com",...}]

Expected: HTTP 404

Note

This is an incomplete fix variant of PR #38145. That PR fixed public_members endpoints only. ListMembers (/orgs/{org}/members) remains unpatched.

Fix

Add to ListMembers(): if !organization.HasOrgOrUserVisible(ctx, ctx.Org.Organization.AsUser(), ctx.Doer) { ctx.APIErrorNotFound() return }

Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "gitea.dev"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.27.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-58427"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-21T21:49:00Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\nPR #38145 fixed ListPublicMembers and IsPublicMember but missed \nListMembers. Any authenticated user can enumerate ALL members \n(not just public ones) of a private organization.\n\n## Affected Versions\n\u003c= v1.26.4 (latest) and main branch\n\n## Root Cause\nrouters/api/v1/org/member.go \u2014 ListMembers():\n\n// Missing check:\nif !organization.HasOrgOrUserVisible(ctx, \n    ctx.Org.Organization.AsUser(), ctx.Doer) {\n    ctx.APIErrorNotFound()\n    return\n}\n\n## Proof of Concept\n\n# Setup: privateorg (private), alice = member, bob = outsider\n\n# Bob lists ALL members of private org\ncurl -s \"http://gitea/api/v1/orgs/privateorg/members\" \\\n  -H \"Authorization: token BOB_TOKEN\"\n\n# Result: HTTP 200\n[{\"login\":\"alice\",\"email\":\"alice@test.com\",...}]\n# Expected: HTTP 404\n\n## Note\nThis is an incomplete fix variant of PR #38145.\nThat PR fixed public_members endpoints only.\nListMembers (/orgs/{org}/members) remains unpatched.\n\n## Fix\nAdd to ListMembers():\nif !organization.HasOrgOrUserVisible(ctx, \n    ctx.Org.Organization.AsUser(), ctx.Doer) {\n    ctx.APIErrorNotFound()\n    return\n}",
  "id": "GHSA-prr9-9mp4-5gp2",
  "modified": "2026-07-21T21:49:00Z",
  "published": "2026-07-21T21:49:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-prr9-9mp4-5gp2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/go-gitea/gitea"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-gitea/gitea/releases/tag/v1.27.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Gitea: Private org member list leaked via /members API endpoint \u2014 incomplete fix for PR #38145"
}



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