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 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
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.

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References

https://access.redhat.com/security/cve/CVE-2026-5119
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2452932
issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/issues/502

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.
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