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, had two vulnerabilities: a use-after-free in its HTTP/2 server component leading to denial of service (CVE-2026-4271) and an information disclosure flaw where cookies could be transmitted in cleartext during HTTPS tunnel setup (CVE-2026-5119). These vulnerabilities affect Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder packages across multiple architectures. Red Hat Product Security has issued a security advisory (RHSA-2026:17482) with updated libsoup3 packages to remediate these issues.
Potential Impact
The denial of service vulnerability (CVE-2026-4271) could allow an attacker to cause a crash or service disruption in applications using libsoup3's HTTP/2 server functionality. The information disclosure vulnerability (CVE-2026-5119) could expose sensitive cookie data during HTTPS tunnel establishment due to cleartext transmission. Both issues are rated as moderate severity 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 10.0 Extended Update Support and related CodeReady Linux Builder variants. Users should apply these official updates as described in Red Hat advisory RHSA-2026:17482 and the referenced article https://access.redhat.com/articles/11258 to remediate the vulnerabilities. Since official fixes are available, applying these patches is the recommended mitigation.
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, had two vulnerabilities: a use-after-free in its HTTP/2 server component leading to denial of service (CVE-2026-4271) and an information disclosure flaw where cookies could be transmitted in cleartext during HTTPS tunnel setup (CVE-2026-5119). These vulnerabilities affect Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder packages across multiple architectures. Red Hat Product Security has issued a security advisory (RHSA-2026:17482) with updated libsoup3 packages to remediate these issues.
Potential Impact
The denial of service vulnerability (CVE-2026-4271) could allow an attacker to cause a crash or service disruption in applications using libsoup3's HTTP/2 server functionality. The information disclosure vulnerability (CVE-2026-5119) could expose sensitive cookie data during HTTPS tunnel establishment due to cleartext transmission. Both issues are rated as moderate severity 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 10.0 Extended Update Support and related CodeReady Linux Builder variants. Users should apply these official updates as described in Red Hat advisory RHSA-2026:17482 and the referenced article https://access.redhat.com/articles/11258 to remediate the vulnerabilities. Since official fixes are available, applying these patches is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:17482
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-5119"]
- Cvss Version
- null
Threat ID: 6a18ab6be29bf47b50287616
Added to database: 5/28/2026, 8:54:03 PM
Last enriched: 5/28/2026, 8:55:45 PM
Last updated: 5/29/2026, 7:15:06 AM
Views: 4
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