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OSV-2026-718
Vulnerability in md4c (OSV-2026-718)
Summary
vulnerability in md4c (OSV-2026-718). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `4f0b252c8e8952d53156949777ebfe3f9355def3` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **OSV-2026-718** has been found in md4c.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade md4c to **4f0b252c8e8952d53156949777ebfe3f9355def3** or later.
If unsure, ask your IT team or search "md4c OSV-2026-718" on the vendor's site.
OSV-2026-718 (md4c) —
Patched: `4f0b252c8e8952d53156949777ebfe3f9355def3` — 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
**A vulnerability** (unclassified) exists in md4c.
📍 Affected scope
md4c — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **4f0b252c8e8952d53156949777ebfe3f9355def3**.
🛡️ 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 'md4c' .` 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 'md4c' . | 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 `md4c` 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 md4c to 4f0b252c8e8952d53156949777ebfe3f9355def3ステージング環境で 4f0b252c8e8952d53156949777ebfe3f9355def3 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
OSS-Fuzz
md4c
[{"repo":"https:\/\/github.com\/mity\/md4c","type":"GIT","events":[{"introduced":"ed89abed05845225cdfe2c94a49ec13a37b7578f"},{"fixed":"4f0b252c8e8952d53156949777ebfe3f9355def3"}]}]