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CVE-2026-52855
critical
CVSS 9.9
Information Disclosure in github.com/pterodactyl/wings (CVE-2026-52855)
Summary
vulnerability in github.com/pterodactyl/wings (CVE-2026-52855). Successful exploitation can lead to full system takeover. Exploitable via ``startup.update``. Mitigation: upgrade to `1.12.3` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-52855** has been found in github.com/pterodactyl/wings.
Attackers can target a specific entry point like ``startup.update`` over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.9/10.
What to do: upgrade github.com/pterodactyl/wings to **1.12.3** or later.
If unsure, ask your IT team or search "github.com/pterodactyl/wings CVE-2026-52855" on the vendor's site.
CVE-2026-52855 (github.com/pterodactyl/wings) — CWE-200 / CVSS v3 9.9
Attack vector: remote (network-reachable) / no user interaction
Attack surface: `startup.update`
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.
❓ What is the problem
**information disclosure** (CWE-200) exists in github.com/pterodactyl/wings. Attackers reach the vulnerable code path via ``startup.update`` without authentication.
📍 Affected scope
github.com/pterodactyl/wings — . Attack surface: `startup.update`.
🔥 Severity
Severity: Critical (CVSS 9.9/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **1.12.3**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'github.com/pterodactyl/wings' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/pterodactyl/wings' . | 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 `github.com/pterodactyl/wings` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade github.com/pterodactyl/wings 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 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in production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 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
go
github.com/pterodactyl/wings
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.12.3"}]}]