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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-4271 Detail

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).


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://access.redhat.com/security/cve/CVE-2026-4271 Red Hat, Inc.
https://bugzilla.redhat.com/show_bug.cgi?id=2448044 Red Hat, Inc.
https://gitlab.gnome.org/GNOME/libsoup/-/issues/496 CISA-ADP, Inc., Red Hat

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free Red Hat, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-4271
NVD Published Date:
03/17/2026
NVD Last Modified:
03/17/2026
Source:
Red Hat, Inc.