Vulnerability Report

CVE-2026-3634

Title: libsoup CRLF injection in Content-Type header

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-3634.

CWE Category CWE-93

Published Date Mar 17, 2026

Modified Date Mar 19, 2026

Exploit Status Not Found

Score 3.9 CVSS v3.1

Exploit Probability (EPSS)

0.04%

Vulnerability Summary

CVE-2026-3634: 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.

Impacted Vendors

libsoup 1

gnome 1

Reference Links

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

CVSS v3.1

Source Entity [email protected]

Severity LOW

3.9

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

REQUIRED

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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