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Red Hat Enterprise Linux 10 EUVDEUVD-2026-17062

| CVE-2026-5119 MEDIUM
Cleartext Transmission of Sensitive Information (CWE-319)
2026-03-30 redhat
5.9
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.9 MEDIUM
AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
SUSE
MEDIUM
qualitative
Red Hat
5.9 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 30, 2026 - 06:30 euvd
EUVD-2026-17062
Analysis Generated
Mar 30, 2026 - 06:30 vuln.today
CVE Published
Mar 30, 2026 - 05:35 nvd
MEDIUM 5.9

DescriptionCVE.org

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.

AnalysisAI

Libsoup transmits sensitive session cookies in cleartext within HTTP CONNECT requests when establishing HTTPS tunnels through configured HTTP proxies, allowing network-positioned attackers or malicious proxies to intercept and hijack user sessions. The vulnerability affects Red Hat Enterprise Linux versions 6 through 10 and carries a CVSS 5.9 score with high confidentiality impact; no public exploit code or confirmed active exploitation has been identified at the time of analysis.

Technical ContextAI

Libsoup is a GNOME HTTP client library used throughout Linux distributions and applications for network communication. The vulnerability stems from improper handling of session cookies during the HTTP CONNECT tunneling protocol (CWE-319: Cleartext Transmission of Sensitive Information), which is used to establish HTTPS connections through HTTP proxies. When a client initiates an HTTPS tunnel, the initial HTTP CONNECT request should not include sensitive authentication headers or cookies; however, libsoup transmits session cookies in this initial cleartext request. An attacker positioned on the network path between the client and proxy, or controlling a malicious HTTP proxy, can observe these cookies before the tunnel is encrypted, enabling session hijacking attacks. The issue affects multiple Red Hat Enterprise Linux versions (6, 7, 8, 9, and 10) via the libsoup package distributed in those distributions.

RemediationAI

Apply the security patch released by Red Hat for your specific RHEL version via the package management system (yum or dnf). Consult the Red Hat Security Advisory at https://access.redhat.com/security/cve/CVE-2026-5119 for the exact patched libsoup version applicable to your Red Hat Enterprise Linux release (6, 7, 8, 9, or 10) and install updates with 'yum update libsoup' or 'dnf update libsoup'. As an interim workaround if immediate patching is not possible, avoid configuring HTTP proxies for HTTPS traffic; instead, use HTTPS proxies or direct connections where feasible. For applications requiring HTTP proxy usage, review proxy authentication methods and consider implementing additional session protection mechanisms (e.g., short-lived tokens or IP pinning) until patching is completed. The upstream GNOME project fix is tracked at https://gitlab.gnome.org/GNOME/libsoup/-/issues/502.

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Vendor StatusVendor

Debian

Bug #1132331
libsoup2.4
Release Status Fixed Version Urgency
bullseye vulnerable 2.72.0-2 -
bullseye (security) vulnerable 2.72.0-2+deb11u3 -
bookworm vulnerable 2.74.3-1+deb12u1 -
trixie vulnerable 2.74.3-10.1 -
(unstable) fixed (unfixed) -
libsoup3
Release Status Fixed Version Urgency
bookworm vulnerable 3.2.3-0+deb12u2 -
trixie vulnerable 3.6.5-3 -
forky, sid vulnerable 3.6.6-1 -
(unstable) fixed (unfixed) -

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Micro 5.2 Fixed

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EUVD-2026-17062 vulnerability details – vuln.today

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