Vulnerability in pterodactyl/panel (CVE-2026-54593)
Summary
Vulnerability in pterodactyl/panel (CVE-2026-54593). Data can be tampered with by attackers. Exploitable via GET /api/client/servers/. Mitigation: upgrade to 1.12.3 or later.
Original description
The description as published by the source.
Summary
A privilege escalation vulnerability exists in the Wings /upload/file endpoint due to insufficient validation of panel-signed JWTs. Wings accepts any valid panel-signed JWT containing server_uuid, user_uuid, and unique_id, regardless of the token’s intended purpose. Because the Panel issues JWTs with these same claims for other lower-privilege operations (such as WebSocket authentication and file download links), an authenticated subuser can reuse one of those tokens to upload arbitrary files without possessing the required file.create permission.
Impact
Any subuser with permission to connect to a server's console, download files, or download backups could reuse those tokens to upload arbitrary files to the same server. A user that does not have access to a server as a subuser is not able to arbitrarily upload files.
Details
The panel generated JWT tokens for various purposes:
- https://github.com/pterodactyl/panel/blob/0f82c105201b192d229f6abd5827e2ee7e672a05/app/Services/Backups/DownloadLinkService.php#L33-L36
- https://github.com/pterodactyl/panel/blob/0f82c105201b192d229f6abd5827e2ee7e672a05/app/Http/Controllers/Api/Client/Servers/FileUploadController.php#L45
- https://github.com/pterodactyl/panel/blob/0f82c105201b192d229f6abd5827e2ee7e672a05/app/Http/Controllers/Api/Client/Servers/WebsocketController.php#L58-L61
- https://github.com/pterodactyl/panel/blob/0f82c105201b192d229f6abd5827e2ee7e672a05/app/Http/Controllers/Api/Client/Servers/File…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-54593 has been found in pterodactyl/panel.
Attackers can target a specific entry point like GET /api/client/servers/ over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 8.1/10.
What to do: upgrade pterodactyl/panel to 1.12.3 or later.
If unsure, ask your IT team or search "pterodactyl/panel CVE-2026-54593" on the vendor's site.
CVE-2026-54593 (pterodactyl/panel) — CWE-1259 / CVSS v3 8.1
Attack vector: remote (network-reachable) / no user interaction
Attack surface: GET /api/client/servers/ / server_uuid / user_uuid / unique_id
Patched: 1.12.3 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-1259) exists in pterodactyl/panel. Attackers reach the vulnerable code path via GET /api/client/servers/.
Check the vendor advisory for the affected versions of pterodactyl/panel. Attack surface: GET /api/client/servers/ / server_uuid / user_uuid / unique_id.
Severity: High (CVSS 8.1/10). Data can be tampered with by attackers.
Update to 1.12.3.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual GET /api/client/servers/ requests with malformed payloads or SQL meta-characters. Run grep -r 'pterodactyl/panel' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'pterodactyl/panel' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
pterodactyl/panelを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'GET /api/client/servers/' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
GET /api/client/servers/への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Apply patch patch
Upgrade pterodactyl/panel to 1.12.3ステージング環境で 1.12.3 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 2 で見つけた異常検知の続報チェックを含めること。
-
4Post-deployment verification verify
Replay attack against GET /api/client/servers/ on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。