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CVE-2026-23950
high
CVSS 8.8
Vulnerability in isaacs (CVE-2026-23950)
Summary
vulnerability in isaacs (CVE-2026-23950). Data can be tampered with by attackers. Exploitable via ``PathReservations``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23950** has been found in isaacs.
Attackers can target a specific entry point like ``PathReservations`` over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 8.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "isaacs CVE-2026-23950" on the vendor's site.
CVE-2026-23950 (isaacs) — CWE-176 / CVSS v3 8.8
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: `PathReservations` / `NFD` / `NFKD` / `SymbolicLink`
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-176) exists in isaacs. Attackers reach the vulnerable code path via ``PathReservations`` without authentication.
📍 Affected scope
isaacs — . Attack surface: `PathReservations` / `NFD` / `NFKD` / `SymbolicLink`.
🔥 Severity
Severity: High (CVSS 8.8/10). Data can be tampered with by attackers
🔧 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 'isaacs' .` 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 'isaacs' . | 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 `isaacs` 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
- advisory https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23950.json
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-23950
- exploit [email protected]
- patch [email protected]
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