Medium 5.9Published Mar 30, 2026

CVE-2026-5119Libsoup: libsoup: information disclosure via cleartext transmission of cookies during https tunnel establishment

Updated under an hour ago (Oct 27, 2026, 2:10 PM ET)

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It affects Red Hat Enterprise Linux 10 and 8 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 10

Exploited in the last 30 days

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.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-319
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Jun 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:3.6.5-3.el10_1.11 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:3.6.5-3.el10_0.15 not affected	CNA record
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support redhat:rhel_els	from 0:2.62.2-12.el7_9 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_aus	from 0:2.62.3-2.el8_4.9 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_eus_long_life	from 0:2.62.3-2.el8_4.9 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service redhat:rhel_e4s	from 0:2.62.3-3.el8_8.9 not affected	CNA record
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service redhat:rhel_tus	from 0:2.62.3-3.el8_8.9 not affected	CNA record
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus	from 0:2.72.0-10.el9_6.7 not affected	CNA record
gnome libsoup gnome:libsoup	all versions	NVD
redhat enterprise_linux redhat:enterprise_linux	7.0; 8.0; 9.0; 10.0	NVD

References

References

https://access.redhat.com/errata/RHSA-2026:13978	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:14087	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:15968	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:17482	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:19143	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:19356	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:21686	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:22316	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:22317	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:22323	vendor-advisory, x-refsource-redhat
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.