Sign in Sign up
JA · EN · FR
SecPulse
← Back
CVE-2026-5121 high CVSS 7.5

Vulnerability in libarchive (CVE-2026-5121)

Summary

vulnerability in libarchive (CVE-2026-5121). Confidential information can be exposed externally.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-5121** has been found in libarchive. Confidential information can be exposed externally. CVSS score: 7.5/10. What to do: apply the vendor's official patched release. If unsure, ask your IT team or search "libarchive CVE-2026-5121" on the vendor's site.
CVE-2026-5121 (libarchive) — CWE-190 / CVSS v3 7.5 Attack vector: remote (network-reachable) / unauthenticated / no user interaction 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-190) exists in libarchive.
📍 Affected scope
libarchive — .
🔥 Severity
Severity: High (CVSS 7.5/10). Confidential information can be exposed externally
🔧 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 'libarchive' .` 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. 1
    Identify exposure identify 
    grep -r 'libarchive' . | 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 `libarchive` を grep し、稼働しているサービス・バージョンを把握する。

  2. 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。

References

🍪 About cookies

We use cookies to keep you logged in, remember your language, and improve the service.

Details →