CVE-2026-2708

Libsoup: libsoup: http request smuggling via duplicate content-length headers

Published: Apr 23, 2026Updated: May 4, 2026 Sources: CVE List NVDCWE-444

3.7LOW

Description

A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-444

Affected Products

gnome

oss-project·USaka glib, gnome project

libsoupLibraryLibrary

OSS Libraries / generic-library

Red Hat

commercial·USaka redhat

Red Hat Enterprise Linux 10On-premOS

Operating Systems / linux-distro

and 5 more affected products View all →

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Collection

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References

https://access.redhat.com/security/cve/CVE-2026-2708

access.redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2440743

bugzilla.redhat.com

https://gitlab.gnome.org/GNOME/libsoup/-/issues/500

gitlab.gnome.org

and 1 more references View all →

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