Red Hat Security Advisory: libsoup3 security update
Two security vulnerabilities have been identified in libsoup3, an HTTP library used in Red Hat Enterprise Linux 10.0 Extended Update Support. The first is a denial of service caused by a use-after-free flaw in the HTTP/2 server implementation (CVE-2026-4271). The second is an information disclosure issue where cookies may be transmitted in cleartext during HTTPS tunnel establishment (CVE-2026-5119). Red Hat has issued a security advisory with updates to address these issues in libsoup3 version 3.6.5-3.el10_0.15 for multiple architectures. The vulnerabilities have been rated with moderate severity by Red Hat. No CVSS scores are provided in the advisory.
AI Analysis
Technical Summary
Libsoup3, an HTTP library implemented in C and used in GNOME applications, contains two vulnerabilities addressed in Red Hat Enterprise Linux 10.0 Extended Update Support. CVE-2026-4271 is a use-after-free vulnerability in the HTTP/2 server component that can lead to denial of service. CVE-2026-5119 involves the cleartext transmission of cookies during HTTPS tunnel establishment, resulting in potential information disclosure. Red Hat released updated packages (libsoup3-3.6.5-3.el10_0.15) for multiple architectures including x86_64, s390x, ppc64le, and aarch64 to remediate these issues. The advisory rates these vulnerabilities as moderate in impact. Detailed CVSS scores are not provided. The advisory references Red Hat's article on applying updates for remediation.
Potential Impact
The use-after-free vulnerability (CVE-2026-4271) can cause denial of service in applications using libsoup3's HTTP/2 server functionality. The information disclosure vulnerability (CVE-2026-5119) can expose cookies in cleartext during HTTPS tunnel establishment, potentially leaking sensitive session information. Both issues affect confidentiality and availability to a moderate degree as rated by Red Hat. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated libsoup3 packages (version 3.6.5-3.el10_0.15) for Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants across supported architectures. Users should apply these official updates following Red Hat's guidance at https://access.redhat.com/articles/11258 to remediate the vulnerabilities. No alternative mitigations or workarounds are indicated in the advisory.
Red Hat Security Advisory: libsoup3 security update
Description
Two security vulnerabilities have been identified in libsoup3, an HTTP library used in Red Hat Enterprise Linux 10.0 Extended Update Support. The first is a denial of service caused by a use-after-free flaw in the HTTP/2 server implementation (CVE-2026-4271). The second is an information disclosure issue where cookies may be transmitted in cleartext during HTTPS tunnel establishment (CVE-2026-5119). Red Hat has issued a security advisory with updates to address these issues in libsoup3 version 3.6.5-3.el10_0.15 for multiple architectures. The vulnerabilities have been rated with moderate severity by Red Hat. No CVSS scores are provided in the advisory.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Libsoup3, an HTTP library implemented in C and used in GNOME applications, contains two vulnerabilities addressed in Red Hat Enterprise Linux 10.0 Extended Update Support. CVE-2026-4271 is a use-after-free vulnerability in the HTTP/2 server component that can lead to denial of service. CVE-2026-5119 involves the cleartext transmission of cookies during HTTPS tunnel establishment, resulting in potential information disclosure. Red Hat released updated packages (libsoup3-3.6.5-3.el10_0.15) for multiple architectures including x86_64, s390x, ppc64le, and aarch64 to remediate these issues. The advisory rates these vulnerabilities as moderate in impact. Detailed CVSS scores are not provided. The advisory references Red Hat's article on applying updates for remediation.
Potential Impact
The use-after-free vulnerability (CVE-2026-4271) can cause denial of service in applications using libsoup3's HTTP/2 server functionality. The information disclosure vulnerability (CVE-2026-5119) can expose cookies in cleartext during HTTPS tunnel establishment, potentially leaking sensitive session information. Both issues affect confidentiality and availability to a moderate degree as rated by Red Hat. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated libsoup3 packages (version 3.6.5-3.el10_0.15) for Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants across supported architectures. Users should apply these official updates following Red Hat's guidance at https://access.redhat.com/articles/11258 to remediate the vulnerabilities. No alternative mitigations or workarounds are indicated in the advisory.
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: 05/28/2026, 20:54:03 UTC
Last enriched: 07/13/2026, 10:53:46 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 54
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