PT-2026-25890 · Libsoup · Libsoup

Osidb Bzimport · Published 2026-01-01 · Updated 2026-03-17 · CVE-2026-3634

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions libsoup (affected versions not specified)

Description A flaw exists in libsoup where an attacker controlling the Content-Type header value can inject a Carriage Return Line Feed (CRLF) sequence due to insufficient input sanitization within the soup message headers set content type() function. This allows for the injection of arbitrary header-value pairs, potentially leading to HTTP header injection and response splitting attacks. A CRLF sequence enables the injection of additional headers or manipulation of the HTTP response.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-93

Related Identifiers

CVE-2026-3634

ECHO-4911-1ADA-38AF

Affected Products

Libsoup

References · 12

• 🔥 https://gitlab.gnome.org/GNOME/libsoup/-/issues/485 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-3634 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-3634 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-3634 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-3634 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-3634 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2445129 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-3634 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-3634 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2033853434193965139 · Twitter Post
• https://twitter.com/CVEarity/status/2033954902117126249 · Twitter Post
• https://twitter.com/CVEnew/status/2033994286551994381 · Twitter Post