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.
Affected products
gnome: libsoup; redhat: enterprise linux
References10
- access.redhat.com/security/cve/CVE-2026-5119 MitigationVendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2452932 Issue TrackingVendor Advisory
- gitlab.gnome.org/GNOME/libsoup/-/issues/502 ExploitIssue Tracking
- 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
Metrics
- CVSS 3.1
-
8.2
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N - EPSS — exploit probability
- 0% percentile: 18 · as of 12 November 2026
- CWE
- CWE-319
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.