CVE-2026-5119

high

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.

References

https://gitlab.gnome.org/GNOME/libsoup/-/issues/502

https://bugzilla.redhat.com/show_bug.cgi?id=2452932

https://access.redhat.com/security/cve/CVE-2026-5119

Details

Source: Mitre, NVD

Published: 2026-03-30

Updated: 2026-04-01

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:P/A:N

Severity: High

CVSS v3

Base Score: 8.2

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Severity: High

EPSS

EPSS: 0.0002