CVE-2026-52815: Gogs.io/gogs Gogs Vulnerable To Unauthenticated Organization Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-744x-3838-5r56",
  "modified" : "2026-07-21T13:40:52Z",
  "published" : "2026-06-23T17:13:25Z",
  "aliases" : [ "CVE-2026-52815" ],
  "summary" : "Gogs Vulnerable to Unauthenticated Organization Teams Information Disclosure via API",
  "details" : "## Summary\n\nGogs has an unauthenticated information disclosure vulnerability. The `GET /api/v1/orgs/:orgname/teams` endpoint at `internal/route/api/v1/org_team.go:8` returns all teams for any organization without requiring authentication. The route group at `internal/route/api/v1/api.go:380-385` lacks the `reqToken()` middleware, and the `listTeams()` handler performs no authentication check, exposing team IDs, names, descriptions, and permission levels to any unauthenticated caller.\n\n## Affected Versions\n\nGogs (all current versions)\n\n## Vulnerability Details\n\n### Root Cause: Missing reqToken() middleware on org teams route group\n\n`internal/route/api/v1/api.go` lines 380-385:\n\n```go\n// Org teams route group — no reqToken() middleware\nm.Group(\"/:orgname\", func() {\n    m.Get(\"/teams\", org.ListTeams) // No auth required\n}, orgAssignment(true))\n```\n\nThe `orgAssignment(true)` middleware only loads the organization object — it performs no authentication. The `listTeams()` handler at `org_team.go:8` returns all teams unconditionally:\n\n```go\nfunc ListTeams(c *context.APIContext) {\n    org := c.Org.Organization\n    teams, err := database.GetTeamsByOrgID(org.ID)\n    // Returns all teams — no c.IsLogged check, no permission check\n}\n```\n\nCompare with other org endpoints that correctly require authentication:\n\n```go\nm.Group(\"/orgs/:orgname\", func() {\n    // ... other endpoints ...\n}, reqToken(), orgAssignment(true, true)) // reqToken() enforces auth\n```\n\n### Attack Chain\n\n- Attacker sends `GET /api/v1/orgs/target-org/teams` with no authentication\n- `orgAssignment(true)` loads the organization but does not check auth\n- `ListTeams()` queries all teams and returns them\n- Response includes team IDs, names, descriptions, and permission levels (read/write/admin/owner)\n\n## Proof of Concept\n\n```bash\n# List all teams in an organization — no authentication needed\ncurl -s \"http://TARGET:3000/api/v1/orgs/myorg/teams\" | python3 -m json.tool\n\n# Expected: 200 OK with full team list\n# [\n#   {\n#     \"id\": 1,\n#     \"name\": \"Owners\",\n#     \"description\": \"Admin team\",\n#     \"permission\": \"owner\"\n#   },\n#   {\n#     \"id\": 2,\n#     \"name\": \"backend-devs\",\n#     \"description\": \"Backend development team\",\n#     \"permission\": \"write\"\n#   }\n# ]\n```\n\n## Impact\n\nAn unauthenticated attacker can:\n\n- Enumerate all teams within any organization, including private/internal teams\n- Discover team permission levels (read/write/admin/owner), aiding privilege escalation planning\n- Map organizational structure and identify high-value targets (admin/owner teams)\n- Harvest team IDs for use in other API calls that may have weaker authorization checks\n\n## Suggested Remediation\n\n```go\nm.Group(\"/:orgname\", func() {\n    m.Get(\"/teams\", org.ListTeams)\n}, reqToken(), orgAssignment(true))\n```\n\nAdd `reqToken()` middleware to the org teams route group, consistent with other authenticated org endpoints. Additionally, `ListTeams()` should verify the authenticated user is a member of the organization.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "gogs.io/gogs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.14.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/gogs/gogs/security/advisories/GHSA-744x-3838-5r56"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-52815"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gogs/gogs/pull/8336"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gogs/gogs/commit/2ebc0e27069deade992219e10a89fbc44bec8bb9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/gogs/gogs"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gogs/gogs/releases/tag/v0.14.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-23T17:13:25Z",
    "nvd_published_at" : "2026-06-24T21:16:57Z"
  }
}