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).
- Score
- CVSS 3.1 7.5 High
- Status
- Modified - secalert@redhat.com
- Published
- 2026-03-17
- Last modified
- 2026-05-19
- Weaknesses
- CWE-416
Affected products
References
- https://access.redhat.com/errata/RHSA-2026:15968
- https://access.redhat.com/errata/RHSA-2026:17482
- https://access.redhat.com/errata/RHSA-2026:19143
- https://access.redhat.com/security/cve/CVE-2026-4271
- https://bugzilla.redhat.com/show_bug.cgi?id=2448044
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/496