Vulnerability in libsoup Affects Network Security
CVE-2026-5119

5.9MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
30 March 2026

What is CVE-2026-5119?

A vulnerability exists in libsoup that compromises the security of sensitive session cookies. During the process of establishing HTTPS tunnels via a configured HTTP proxy, these cookies are transmitted in cleartext within the initial HTTP CONNECT request. This flaw allows a network attacker or a malicious proxy to intercept sensitive data, raising concerns about potential session hijacking and user impersonation.

Affected Version(s)

Red Hat Enterprise Linux 10 0:3.6.5-3.el10_1.11

Red Hat Enterprise Linux 10 0:3.6.5-3.el10_2.11

Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.6.5-3.el10_0.15

References

https://access.redhat.com/errata/RHSA-2026:13978
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:14087
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:15968
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Kona Arctic for reporting this issue.
.