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CVE-2026-0719 high CVSS 8.6

Vulnerability in libsoup's NTLM (NT LAN Manager) authentication module (CVE-2026-0719)

Summary

Vulnerability in libsoup's NTLM (NT LAN Manager) authentication module (CVE-2026-0719). Risk of unauthorized operations or information disclosure.

Original description

The description as published by the source.

A flaw was found in libsoup's NTLM (NT LAN Manager) authentication module. When NTLM authentication is enabled, a local attacker can exploit a stack-based buffer overflow vulnerability in the md4sum() function. This allows the attacker to overwrite adjacent memory, which may result in arbitrary code execution with the privileges of the affected application.

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-0719 has been found in libsoup's NTLM (NT LAN Manager) authentication module.
Risk of unauthorized operations or information disclosure. CVSS score: 8.6/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "libsoup's NTLM (NT LAN Manager) authentication module CVE-2026-0719" on the vendor's site.

CVE-2026-0719 (libsoup's NTLM (NT LAN Manager) authentication module) — CWE-121 / CVSS v3 8.6
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-121) exists in libsoup's NTLM (NT LAN Manager) authentication module.

📍 Affected scope

Check the vendor advisory for the affected versions of libsoup's NTLM (NT LAN Manager) authentication module.

🔥 Severity

Severity: High (CVSS 8.6/10). 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. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで libsoup's NTLM (NT LAN Manager) authentication module を使っているサービスとバージョンを洗い出す。

  2. 2
    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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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