RHSA-2026:19143: Moderate: libsoup3 security update

Published May 19, 2026
·
Updated

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.

Affected Software

39 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64
Red Hat Red Hat Enterprise Linux for Power, little endian - 4 years of support
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for x86_64
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Red Hat Enterprise Linux for IBM z Systems
Red Hat Red Hat Enterprise Linux for Power, little endian
Red Hat Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Red Hat Enterprise Linux for x86_64 - 4 years of updates
Red Hat Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for ARM 64
redhat/libsoup3<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-debuginfo<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-debugsource<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-devel<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-debuginfo<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-debugsource<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-devel<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-debuginfo<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-debugsource<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3-devel<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11
redhat/libsoup3<3.6.5-3.el10_2.11.aa
3.6.5-3.el10_2.11.aa
redhat/libsoup3-debuginfo<3.6.5-3.el10_2.11.aa
3.6.5-3.el10_2.11.aa
redhat/libsoup3-debugsource<3.6.5-3.el10_2.11.aa
3.6.5-3.el10_2.11.aa
redhat/libsoup3-devel<3.6.5-3.el10_2.11.aa
3.6.5-3.el10_2.11.aa
redhat/libsoup3-doc<3.6.5-3.el10_2.11
3.6.5-3.el10_2.11

Remediation

Event History

May 19, 2026
Advisory Published
via Red Hat·02:44 PM
Data Sourced
via Red Hat·02:44 PM
DescriptionSeverityAffected Software
May 23, 2026
Advisory Published
via Red Hat·03:35 PM
Data Sourced
via Red Hat·03:35 PM
Remedy

Frequently Asked Questions

1

What is the severity of RHSA-2026:19143?

The severity of RHSA-2026:19143 is classified as moderate.

2

How do I fix RHSA-2026:19143?

You can resolve RHSA-2026:19143 by applying the recommended security updates for libsoup3.

3

Which systems are affected by RHSA-2026:19143?

RHSA-2026:19143 affects various versions of Red Hat Enterprise Linux, including ARM, Power, and IBM z Systems.

4

What is the purpose of the libsoup3 update in RHSA-2026:19143?

The libsoup3 update in RHSA-2026:19143 addresses security vulnerabilities within the HTTP library implementation.

5

Is RHSA-2026:19143 part of a larger issue?

Yes, RHSA-2026:19143 is linked to previous vulnerabilities, which may have impacted the security of related components.

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