CVE-2026-4271

A flaw was found in libsoup, a library for handling HTTP requests. This vulnerability, known as a Use-After-Free, occurs in the HTTP/2 server implementation. A remote attacker can exploit this by sending specially crafted HTTP/2 requests that cause authentication failures. This can lead to the application attempting to access memory that has already been freed, potentially causing application instability or crashes, resulting in a Denial of Service (DoS).

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-4271	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2448044	Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/issues/496	Exploit Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/issues/496	Exploit Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnome:libsoup:-:::::::*
	cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

No history.

Information

Published : 2026-03-17 12:16

Updated : 2026-03-19 19:33

NVD link : CVE-2026-4271

Mitre link : CVE-2026-4271

CVE.ORG link : CVE-2026-4271

JSON object : View

Products Affected

gnome

libsoup

redhat

enterprise_linux

CWE

CWE-416

Use After Free

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