Use After Free The advisory has been revoked - it doesn't affect any version of package libsoup (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CENTOS7-LIBSOUP-15690464
- published19 Mar 2026
- disclosed16 Mar 2026
Introduced: 16 Mar 2026
CVE-2026-4271 (opens in a new tab)Amendment
The Centos security team deemed this advisory irrelevant for Centos:7.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libsoup package and not the libsoup package as distributed by Centos.
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).
References
- https://access.redhat.com/security/cve/CVE-2026-4271
- https://bugzilla.redhat.com/show_bug.cgi?id=2448044
- 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://gitlab.gnome.org/GNOME/libsoup/-/issues/496