Vulnerability in validator-string (MAL-2026-10109)

Summary

vulnerability in validator-string (MAL-2026-10109). Risk of unauthorized operations or information disclosure. Exploitable via ``validator``.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **MAL-2026-10109** has been found in validator-string. Attackers can target a specific entry point like ``validator`` 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 "validator-string MAL-2026-10109" on the vendor's site.

MAL-2026-10109 (validator-string) — Attack surface: `validator` / `main` / `index.js` / `require` 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 validator-string. Attackers reach the vulnerable code path via ``validator`` without authentication.

📍 Affected scope

validator-string — . Attack surface: `validator` / `main` / `index.js` / `require`.

🔥 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 request patterns matching this CVE's known IOCs. Run `grep -r 'validator-string' .` 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 'validator-string' . | 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 `validator-string` を grep し、稼働しているサービス・バージョンを把握する。
7
Post-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

npm validator-string

References

package https://www.npmjs.com/package/validator-string/v/13.15.36