CVE-2026-52855: Github.com/pterodactyl/wings Wings Exposes Node Configuration Secrets Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pfvc-3p5h-x7h6",
  "modified" : "2026-07-31T16:16:46Z",
  "published" : "2026-07-31T16:16:46Z",
  "aliases" : [ "CVE-2026-52855" ],
  "summary" : "Wings exposes node configuration secrets through egg configuration-file templating",
  "details" : "### Impact\n\n**Type:** Exposure of sensitive information / insufficiently protected credentials\nleading to privilege escalation and full node compromise.\n\nWings exposes its **entire** daemon configuration to the egg configuration-file\ntemplating engine. When Wings renders a server's configuration files, any\n`{{config.<path>}}` placeholder in a replacement value is resolved against the\nfull marshalled daemon configuration, with no restriction on which paths may be\nread.\n\nBecause the Panel substitutes **user-controlled** egg variable values into these\nreplacements before sending them to Wings, a low-privileged user can smuggle a\n`{{config.*}}` placeholder through a variable value. The placeholder is then\nresolved by Wings and written into a file inside the user's own server, where it\ncan be read via the file manager or SFTP.\n\nThis allows reading, among other values:\n\n- `{{config.token}}` - the node's daemon token, which is both the API bearer for\n  the Panel⇆Wings channel **and** the HMAC signing key for every JWT the node\n  issues;\n- `{{config.token_id}}`;\n- `{{config.docker.registries}}` - configured container-registry credentials.\n\n**Who is impacted:** Any deployment where a user who is not fully trusted can set\nan egg variable value (e.g. a server owner or a subuser with the `startup.update`\npermission) **and** the server's egg renders a user-editable variable into a\nconfiguration file via `{{server.build.env.*}}`. This pattern is common across\nstock and community eggs, so most multi-tenant / shared-hosting deployments are\naffected.\n\n**Resulting impact:** Disclosure of the node daemon token lets the attacker forge\nauthentication tokens and act against **every server on that node**, a full-node compromise reachable from a low-privileged\naccount.\n\n### Patches\n\nYes. Fixed in **Wings `v1.12.3`** (Panel is unaffected; the fix is Wings-only).\n\nWings no longer exposes its full configuration to the templating engine only an\nexplicit, non-secret subset (the Docker network interface) can be resolved by\n`{{config.*}}` placeholders.\n\nUsers should upgrade Wings to `v1.12.3` or later.\n\n**After upgrading, rotate the affected nodes' daemon tokens**, since a previously\nexfiltrated token remains valid until rotated (Admin → Nodes → Configuration →\nreset the token, then re-deploy `config.yml` to the node).\n\n### Workarounds\n\nFor operators who cannot upgrade immediately:\n\n- Audit your eggs and ensure no **user-editable** variable is rendered into a\n  configuration file, or mark such variables non-editable.\n\nThese reduce exposure but are not a complete fix; upgrading Wings is the\nrecommended action.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/pterodactyl/wings"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.12.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/security/advisories/GHSA-pfvc-3p5h-x7h6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/commit/eb65e27ae077a63e38518c490768486af1cd86a9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pterodactyl/wings"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/releases/tag/v1.12.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-522" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-31T16:16:46Z",
    "nvd_published_at" : null
  }
}