HTTP Header Injection Vulnerability in GNOME's Libsoup
CVE-2026-3634

3.9LOW

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
17 March 2026

What is CVE-2026-3634?

A vulnerability has been identified in GNOME's Libsoup, where improper input sanitization in the 'soup_message_headers_set_content_type()' function allows attackers to control the content of the Content-Type header. This flaw enables the injection of a Carriage Return Line Feed (CRLF) sequence, which can lead to HTTP header injection and response splitting attacks. As a result, malicious entities may exploit this flaw to manipulate server responses, creating opportunities for further attacks.

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References

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

CVSS V3.1

Score:
3.9
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
High
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Codean Labs for reporting this issue.
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