CVE-2026-3633 LOW

CVE-2026-3633: Libsoup: libsoup: header and http request injection via crlf injection

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-93 · CRLF injection
Published March 17, 2026
Last update March 19, 2026

CVSS base score

3.9/10
Attack vector Network
Attack complexity High
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 17, 2026 CVE published
March 19, 2026 Record updated