CVEvulnerability
CVE-2026-4271
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-03-17
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-416
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).
Affected configurations
• gnome libsoup
• redhat enterprise linux 6.0
• redhat enterprise linux 7.0
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
• redhat enterprise linux 10.0
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://access.redhat.com/errata/RHSA-2026:15968 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:17482 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:19143 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-4271 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2448044 Issue Tracking, Vendor Advisory
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/496 Exploit, Issue Tracking, Vendor Advisory
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/496 Exploit, Issue Tracking, Vendor Advisory