Red Hat Security Advisory: libsoup3 security update
Libsoup is an HTTP library implementation in C. It was originally part of a SOAP (Simple Object Access Protocol) implementation called Soup, but the SOAP and non-SOAP parts have now been split into separate packages. libsoup uses the Glib main loop and is designed to work well with GTK applications. This enables GNOME applications to access HTTP servers on the network in a completely asynchronous fashion, very similar to the Gtk+ programming model (a synchronous operation mode is also supported for those who want it), but the SOAP parts were removed long ago. Security Fix(es): * libsoup: libsoup: Denial of Service via Use-After-Free in HTTP/2 server (CVE-2026-4271) * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment (CVE-2026-5119) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
Libsoup3, an HTTP library implemented in C and used in GNOME applications, has two security issues fixed in Red Hat Enterprise Linux 10 updates. CVE-2026-4271 is a use-after-free vulnerability in the HTTP/2 server that can cause denial of service. CVE-2026-5119 involves the cleartext transmission of cookies during HTTPS tunnel setup, leading to potential information disclosure. Red Hat has released updated libsoup3 packages to remediate these vulnerabilities as detailed in advisory RHSA-2026:19143.
Potential Impact
The denial of service vulnerability (CVE-2026-4271) could allow an attacker to cause service disruption by exploiting a use-after-free bug in the HTTP/2 server component of libsoup3. The information disclosure vulnerability (CVE-2026-5119) could expose sensitive cookie data during HTTPS tunnel establishment due to cleartext transmission. Both issues have a moderate security impact as rated by Red Hat. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated libsoup3 packages for Red Hat Enterprise Linux 10 and related products that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:19143 and the referenced article https://access.redhat.com/articles/11258. Applying these official patches fully mitigates the identified security issues. No additional mitigation actions are indicated by the vendor.
Red Hat Security Advisory: libsoup3 security update
Description
Libsoup is an HTTP library implementation in C. It was originally part of a SOAP (Simple Object Access Protocol) implementation called Soup, but the SOAP and non-SOAP parts have now been split into separate packages. libsoup uses the Glib main loop and is designed to work well with GTK applications. This enables GNOME applications to access HTTP servers on the network in a completely asynchronous fashion, very similar to the Gtk+ programming model (a synchronous operation mode is also supported for those who want it), but the SOAP parts were removed long ago. Security Fix(es): * libsoup: libsoup: Denial of Service via Use-After-Free in HTTP/2 server (CVE-2026-4271) * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment (CVE-2026-5119) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Libsoup3, an HTTP library implemented in C and used in GNOME applications, has two security issues fixed in Red Hat Enterprise Linux 10 updates. CVE-2026-4271 is a use-after-free vulnerability in the HTTP/2 server that can cause denial of service. CVE-2026-5119 involves the cleartext transmission of cookies during HTTPS tunnel setup, leading to potential information disclosure. Red Hat has released updated libsoup3 packages to remediate these vulnerabilities as detailed in advisory RHSA-2026:19143.
Potential Impact
The denial of service vulnerability (CVE-2026-4271) could allow an attacker to cause service disruption by exploiting a use-after-free bug in the HTTP/2 server component of libsoup3. The information disclosure vulnerability (CVE-2026-5119) could expose sensitive cookie data during HTTPS tunnel establishment due to cleartext transmission. Both issues have a moderate security impact as rated by Red Hat. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated libsoup3 packages for Red Hat Enterprise Linux 10 and related products that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:19143 and the referenced article https://access.redhat.com/articles/11258. Applying these official patches fully mitigates the identified security issues. No additional mitigation actions are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:19143
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-5119"]
- Cvss Version
- null
Threat ID: 6a18ab6be29bf47b50287636
Added to database: 5/28/2026, 8:54:03 PM
Last enriched: 5/28/2026, 8:56:13 PM
Last updated: 5/29/2026, 9:29:54 AM
Views: 4
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