CVE-2026-4271
Published: Mar 17, 2026
Modified: May 19, 2026
CVSS v3.1
5.3
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).
| Vendor | Product | Versions |
|---|---|---|
Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:3.6.5-3.el10_1.11 - < * |
Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:3.6.5-3.el10_2.11 - < * |
Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | unaffected 0:3.6.5-3.el10_0.15 - < * |
Red Hat | Red Hat Enterprise Linux 6 | All versions |
Red Hat | Red Hat Enterprise Linux 7 | All versions |
Red Hat | Red Hat Enterprise Linux 8 | All versions |
Red Hat | Red Hat Enterprise Linux 9 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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