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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

History

Tue, 17 Mar 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 17 Mar 2026 10:00:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. 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.
Title libsoup: libsoup: HTTP Smuggling and Server-Side Request Forgery via Malformed Hostnames Libsoup: libsoup: http smuggling and server-side request forgery via malformed hostnames
First Time appeared Redhat
Redhat enterprise Linux
CPEs 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
Vendors & Products Redhat
Redhat enterprise Linux
References

Mon, 09 Mar 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Libsoup
Libsoup libsoup
Vendors & Products Libsoup
Libsoup libsoup

Fri, 06 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title libsoup: libsoup: HTTP Smuggling and Server-Side Request Forgery via Malformed Hostnames
Weaknesses CWE-1286
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L'}

threat_severity

Low


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-03-17T13:02:07.183Z

Reserved: 2026-03-06T07:51:17.978Z

Link: CVE-2026-3632

cve-icon Vulnrichment

Updated: 2026-03-17T13:02:02.916Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-17T10:16:00.297

Modified: 2026-03-17T14:20:01.670

Link: CVE-2026-3632

cve-icon Redhat

Severity : Low

Publid Date: 2026-03-06T05:05:00Z

Links: CVE-2026-3632 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-03-09T10:08:43Z

Weaknesses