VYPR
Unrated severityNVD Advisory· Published Mar 17, 2026· Updated Mar 19, 2026

Libsoup: libsoup: http smuggling and server-side request forgery via malformed hostnames

CVE-2026-3632

Description

A flaw was found in libsoup, a library used by applications to send network requests. This vulnerability occurs because libsoup does not properly validate hostnames, allowing special characters to be injected into HTTP headers. A remote attacker could exploit this to perform HTTP smuggling, where they can send hidden, malicious requests alongside legitimate ones. In certain situations, this could lead to Server-Side Request Forgery (SSRF), enabling an attacker to force the server to make unauthorized requests to other internal or external systems. The impact is low, as SoupServer is not actually used in internet infrastructure.

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Affected products

6
  • Red Hat/Enterprise Linux Servercpe-rescue5 versions
    cpe:/o:redhat:enterprise_linux:10+ 4 more
    • cpe:/o:redhat:enterprise_linux:10
    • cpe:/o:redhat:enterprise_linux:6
    • cpe:/o:redhat:enterprise_linux:7
    • cpe:/o:redhat:enterprise_linux:8
    • cpe:/o:redhat:enterprise_linux:9
  • Libsoup/Libsoupllm-fuzzy

Patches

Vulnerability mechanics

References

3

News mentions

0

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CVE-2026-3632 · VYPR