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CVE-2026-3591
medium
CVSS 5.4
Vulnerability in isc (CVE-2026-3591)
Summary
vulnerability in isc (CVE-2026-3591). Risk of unauthorized operations or information disclosure. Exploitable via ``named``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-3591** has been found in isc.
Attackers can target a specific entry point like ``named`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "isc CVE-2026-3591" on the vendor's site.
CVE-2026-3591 (isc) — CWE-305 / CVSS v3 5.4
Attack vector: remote (network-reachable) / no user interaction
Attack surface: `named`
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** (CWE-305) exists in isc. Attackers reach the vulnerable code path via ``named`` without authentication.
📍 Affected scope
isc — . Attack surface: `named`.
🔥 Severity
Severity: Medium (CVSS 5.4/10). 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 'isc' .` 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 'isc' . | 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 `isc` 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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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。
References
- patch [email protected]
- patch [email protected]
- patch [email protected]