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CVE-2026-3634

Libsoup: libsoup: http header injection and response splitting via crlf injection in content-type header

Published: Mar 17, 2026Updated: Mar 19, 2026 Sources: CVE List NVDCWE-93
NVD MITRE
3.9CVSSLOW
EPSS Score
0.2%
Top 91.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in libsoup. An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the `soup_message_headers_set_content_type()` function. This vulnerability allows for the injection of arbitrary header-value pairs, potentially leading to HTTP header injection and response splitting attacks.

CVSS Vector Breakdown

AV:NAC:HPR:HUI:RS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-93

Affected Products

libsoupgnome
LibraryLibrary
OSS Libraries / generic-library
enterprise linuxredhat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 10Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 6Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 7Red Hat
On-premOS
Operating Systems / linux-distro
gnomeoss-projectUSConsumer Softwareaka gnome project, glib
redhatcommercialUSOperating Systemsaka red hat
red hatcommercialUSOperating Systemsaka red hat
and 2 more affected products View all →

Exploitability

Official Patch Available
Workaround Available

References

https://access.redhat.com/security/cve/CVE-2026-3634
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2445129
bugzilla.redhat.com
https://gitlab.gnome.org/GNOME/libsoup/-/issues/485
gitlab.gnome.org

Timeline

Published
Mar 17, 2026
Last Updated
Mar 19, 2026

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