Use After Free in Gnome Libsoup
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 t…
Vulnerability class: Use-After-Free
EPSS: 0.009 (76.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Gnome Libsoup
- Red Hat Enterprise Linux 10 — versions 0:3.6.5-3.el10_2.11, 0:3.6.5-3.el10_1.11
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:3.6.5-3.el10_0.15
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Redhat Enterprise_linux — versions 6.0, 7.0, 8.0
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (Exploit, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-4271?
- CVE-2026-4271 is a medium-severity vulnerability in Gnome Libsoup, classified under Use After Free. CVSS score: 5.3/10. Published 2026-03-17.
- How severe is CVE-2026-4271?
- Medium severity. CVSS v3 base score is 5.3 out of 10.