medium5.3
CVE-2026-4271
A flaw was found in libsoup, a library for handling HTTP requests.
Impact
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).
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gnome | Libsoup | All versions |
| Redhat | Enterprise Linux | Versions 6.0, 7.0, 8.0, 9.0, 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- 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
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/496