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Ubuntu CVE-2026-3634

| EUVDEUVD-2026-12561 LOW
Improper Neutralization of CRLF Sequences ('CRLF Injection') (CWE-93)
2026-03-17 redhat
3.9
CVSS 3.1 · NVD

Severity by source

NVD PRIMARY
3.9 LOW
AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
Ubuntu
MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 17, 2026 - 11:57 euvd
EUVD-2026-12561
Analysis Generated
Mar 17, 2026 - 11:57 vuln.today
CVE Published
Mar 17, 2026 - 09:44 nvd
LOW 3.9

DescriptionCVE.org

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.

AnalysisAI

A security vulnerability in A flaw (CVSS 3.9). Remediation should follow standard vulnerability management procedures.

Technical ContextAI

Vulnerability type not specified by vendor. Affects A flaw.

RemediationAI

Monitor vendor channels for patch availability.

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Vendor StatusVendor

Ubuntu

Priority: Medium
libsoup2.4
Release Status Version
upstream needs-triage -
bionic deferred 2026-03-11
focal deferred 2026-03-11
jammy deferred 2026-03-11
noble deferred 2026-03-11
questing deferred 2026-03-11
xenial deferred 2026-03-11
libsoup3
Release Status Version
upstream needs-triage -
jammy deferred 2026-03-11
noble deferred 2026-03-11
questing deferred 2026-03-11

Debian

Bug #1130501
libsoup2.4
Release Status Fixed Version Urgency
bullseye vulnerable 2.72.0-2 -
bullseye (security) vulnerable 2.72.0-2+deb11u3 -
bookworm vulnerable 2.74.3-1+deb12u1 -
trixie vulnerable 2.74.3-10.1 -
(unstable) fixed (unfixed) -
libsoup3
Release Status Fixed Version Urgency
bookworm vulnerable 3.2.3-0+deb12u2 -
trixie vulnerable 3.6.5-3 -
forky, sid vulnerable 3.6.6-1 -
(unstable) fixed (unfixed) -

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CVE-2026-3634 vulnerability details – vuln.today

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