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3.9 Low

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

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 3.1 detail

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

Exploitable remotely over the network, with an administrator account and if a user takes an action; the impact on data or service is limited.

Attack vector
Network
Attack complexity
High
Privileges required
High
Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
The 1456 CVEs of Red Hat Enterprise Linux 10 →
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