CVE-2026-3634 — LOW (3.9) — White Hats Nepal

Vulnerability 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 Score

3.9

LOW

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Gnome	Libsoup	-
Redhat	Enterprise Linux	6.0

Related Weaknesses (CWE)

CWE-93

References

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

FAQ

What is CVE-2026-3634?

CVE-2026-3634 is a vulnerability with a CVSS score of 3.9 (LOW). 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 `sou...

How severe is CVE-2026-3634?

CVE-2026-3634 has been rated LOW with a CVSS base score of 3.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-3634?

Check the references section above for vendor advisories and patch information. Affected products include: Gnome Libsoup, Redhat Enterprise Linux.