Vulnerability 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).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnome | Libsoup | - |
| Redhat | Enterprise Linux | 6.0 |
Related Weaknesses (CWE)
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-2026-4271Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2448044Issue TrackingVendor Advisory
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/496ExploitIssue TrackingVendor Advisory
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/496ExploitIssue TrackingVendor Advisory
FAQ
What is CVE-2026-4271?
CVE-2026-4271 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 send...
How severe is CVE-2026-4271?
CVE-2026-4271 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4271?
Check the references section above for vendor advisories and patch information. Affected products include: Gnome Libsoup, Redhat Enterprise Linux.