Vulnerability in express-self-destruct (MAL-2026-5553)

Summary

vulnerability in express-self-destruct (MAL-2026-5553). Risk of unauthorized operations or information disclosure. Exploitable via `GET /robots.txt`.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **MAL-2026-5553** has been found in express-self-destruct. Attackers can target a specific entry point like `GET /robots.txt` over the network to misuse the product. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: apply the vendor's official patched release. If unsure, ask your IT team or search "express-self-destruct MAL-2026-5553" on the vendor's site.

MAL-2026-5553 (express-self-destruct) — Attack surface: GET /robots.txt / `postinstall` / `main` / `index.js` 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

**A vulnerability** (unclassified) exists in express-self-destruct. Attackers reach the vulnerable code path via `GET /robots.txt` without authentication.

📍 Affected scope

express-self-destruct — . Attack surface: GET /robots.txt / `postinstall` / `main` / `index.js`.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ 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 `GET /robots.txt` requests with malformed payloads or SQL meta-characters. Run `grep -r 'express-self-destruct' .` 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

1
Identify exposure identify
```
grep -r 'express-self-destruct' . | 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 `express-self-destruct` を grep し、稼働しているサービス・バージョンを把握する。
3
Hunt for indicators of compromise detect
```
grep 'GET /robots.txt' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'
```
アクセスログで `GET /robots.txt` 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。
7
Post-deployment verification verify
```
Replay attack against GET /robots.txt 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 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

npm express-self-destruct

References

package https://www.npmjs.com/package/express-self-destruct/v/1.0.0