CVE-2026-5119
Medium
Description
A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Gnome Libsoup
PublishedMar 30, 2026
First seenMar 30, 2026
Weakness typeCWE-319CWE-319
How to fix
Vendor advisories
- access.redhat.com/security/cve/CVE-2026-5119
- bugzilla.redhat.com/show_bug.cgi?id=2452932
- access.redhat.com/errata/RHSA-2026:13978
- access.redhat.com/errata/RHSA-2026:14087
- access.redhat.com/errata/RHSA-2026:15968
- access.redhat.com/errata/RHSA-2026:17482
- access.redhat.com/errata/RHSA-2026:19143
- access.redhat.com/errata/RHSA-2026:19356
- access.redhat.com/errata/RHSA-2026:21686
- access.redhat.com/errata/RHSA-2026:22316
- access.redhat.com/errata/RHSA-2026:22317
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnome libsoup | No range specified | — |
| redhat enterprise_linux | 7.0, 8.0, 9.0, 10.0 | — |
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