Libsoup: libsoup: information disclosure via cleartext transmission of cookies during https tunnel establishment
Summary
| CVE | CVE-2026-5119 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-30 07:15:58 UTC |
| Updated | 2026-06-01 19:16:54 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 8.2 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS: 0.000180000 probability, percentile 0.047220000 (date 2026-06-01)
Problem Types: CWE-319 | CWE-319 Cleartext Transmission of Sensitive Information
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 8.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| 3.1 | [email protected] | Secondary | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N |
| 3.1 | CNA | CVSS | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Gnome | Libsoup | - | All | All | All |
| Operating System | Redhat | Enterprise Linux | 10.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux | 7.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux | 8.0 | All | All | All |
| Operating System | Redhat | Enterprise Linux | 9.0 | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:3.6.5-3.el10_1.11 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:3.6.5-3.el10_2.11 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | unaffected 0:3.6.5-3.el10_0.15 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:2.62.3-14.el8_10 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:2.62.3-14.el8_10 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:2.72.0-12.el9_7.6 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:2.72.0-16.el9_8.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions | unaffected 0:2.72.0-8.el9_0.10 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions | unaffected 0:2.72.0-8.el9_2.11 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.4 Update Services For SAP Solutions | unaffected 0:2.72.0-8.el9_4.10 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | unaffected 0:2.72.0-10.el9_6.7 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 6 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 7 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:21686 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:19356 | [email protected] | access.redhat.com | |
| gitlab.gnome.org/GNOME/libsoup/-/issues/502 | [email protected] | gitlab.gnome.org | Exploit, Issue Tracking |
| access.redhat.com/errata/RHSA-2026:14087 | [email protected] | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-5119 | [email protected] | access.redhat.com | Mitigation, Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:13978 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:22316 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:22323 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:15968 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:19143 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | Issue Tracking, Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:22317 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:17482 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank Kona Arctic for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-03-30T05:15:27.541Z | Reported to Red Hat. |
| CNA | 2026-03-30T05:30:32.610Z | Made public. |
Workarounds
CNA: To mitigate this issue, ensure that all HTTP proxies used for HTTPS tunnels are trusted and operate within a secure network. Avoid configuring applications to use untrusted HTTP proxies. If feasible, configure applications to bypass proxies for sensitive connections or utilize a secure proxy solution that encrypts the entire communication channel. A service restart or application reload may be required for changes to take effect.
There are currently no legacy QID mappings associated with this CVE.