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CVE-2026-3633

Libsoup: libsoup: header and http request injection via crlf injection

Published: Mar 17, 2026Updated: Mar 19, 2026 Sources: CVE List NVDCWE-93
NVD MITRE
3.9CVSSLOW
EPSS Score
0.2%
Top 87.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw was found in libsoup. A remote attacker, by controlling the method parameter of the `soup_message_new()` function, could inject arbitrary headers and additional request data. This vulnerability, known as CRLF (Carriage Return Line Feed) injection, occurs because the method value is not properly escaped during request line construction, potentially leading to HTTP request injection.

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-2026-3633
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2445128
bugzilla.redhat.com
https://gitlab.gnome.org/GNOME/libsoup/-/issues/484
gitlab.gnome.org

Timeline

Published
Mar 17, 2026
Last Updated
Mar 19, 2026

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