CVE-2026-4271

5.3 MEDIUM
Published: March 17, 2026 Modified: March 19, 2026
View on NVD

Description

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).

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-4271
Source: secalert@redhat.com
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2448044
Source: secalert@redhat.com
Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/issues/496
Source: secalert@redhat.com
Exploit Issue Tracking Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/issues/496
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Issue Tracking Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.6%
69th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

gnome redhat