CVE-2026-5119

Libsoup: libsoup: information disclosure via cleartext transmission of cookies during https tunnel establishment

MEDIUM 5.9

At a glance

Source: NVD
EPSS: EPSS 0.26 % · percentile 18 (2026-10-28)
State: PUBLISHED
Published: 2026-03-30 05:35 UTC
Updated: 2026-06-09 08:57 UTC
Assigner: redhat
NVD status: Modified

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.

Weaknesses (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N	redhat
CVSS 3.1	MEDIUM 5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N	NVD · secalert@redhat.com (Secondary)
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2026-17062
GCVE · GCVE-0-2026-5119

Affected configurations (NVD CPE)

cpe:2.3:a:gnome:libsoup:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Affected products

Product	Versions
Red Hat · Red Hat Enterprise Linux 10	unaffected 0:3.6.5-3.el10_1.11 < *
Red Hat · Red Hat Enterprise Linux 10	unaffected 0:3.6.5-3.el10_2.11 < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support	unaffected 0:3.6.5-3.el10_0.15 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support	unaffected 0:2.62.2-12.el7_9 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:2.62.3-14.el8_10 < *
Red Hat · Red Hat Enterprise Linux 8	unaffected 0:2.62.3-14.el8_10 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected 0:2.62.3-2.el8_4.9 < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	unaffected 0:2.62.3-2.el8_4.9 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	unaffected 0:2.62.3-2.el8_6.9 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	unaffected 0:2.62.3-2.el8_6.9 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service	unaffected 0:2.62.3-3.el8_8.9 < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	unaffected 0:2.62.3-3.el8_8.9 < *
Red Hat · Red Hat Enterprise Linux 9	unaffected 0:2.72.0-12.el9_7.6 < *
Red Hat · Red Hat Enterprise Linux 9	unaffected 0:2.72.0-16.el9_8.1 < *
Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	unaffected 0:2.72.0-8.el9_0.10 < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	unaffected 0:2.72.0-8.el9_2.11 < *
Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	unaffected 0:2.72.0-8.el9_4.10 < *
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support	unaffected 0:2.72.0-10.el9_6.7 < *
Red Hat · Red Hat Enterprise Linux 6

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD