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.

The remote MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-573:08 advisory.

    * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel     establishment (CVE-2026-5119)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:14087 advisory.

    * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel     establishment (CVE-2026-5119)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-14087 advisory.

    - Backport patch for CVE-2026-5119

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:13978 advisory.

    * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel     establishment (CVE-2026-5119)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:14087 advisory.

    * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel     establishment (CVE-2026-5119)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-13978 advisory.

    [2.72.0-12.6]
    - Backport patch for CVE-2026-5119

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:13978 advisory.

    The libsoup packages provide an HTTP client and server library for GNOME.

    Security Fix(es):

    * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel     establishment (CVE-2026-5119)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:14087 advisory.

    The libsoup packages provide an HTTP client and server library for GNOME.

    Security Fix(es):

    * libsoup: libsoup: Information disclosure via cleartext transmission of cookies during HTTPS tunnel     establishment (CVE-2026-5119)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-5119)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
313229	MiracleLinux 9 : libsoup-2.72.0-12.el9_7.6 (AXSA:2026-573:08)	Nessus	Miracle Linux Local Security Checks	high
313193	AlmaLinux 8 : libsoup (ALSA-2026:14087)	Nessus	Alma Linux Local Security Checks	high
313043	Oracle Linux 8 : libsoup (ELSA-2026-14087)	Nessus	Oracle Linux Local Security Checks	high
313038	RockyLinux 9 : libsoup (RLSA-2026:13978)	Nessus	Rocky Linux Local Security Checks	high
313018	RockyLinux 8 : libsoup (RLSA-2026:14087)	Nessus	Rocky Linux Local Security Checks	high
312826	Oracle Linux 9 : libsoup (ELSA-2026-13978)	Nessus	Oracle Linux Local Security Checks	high
312658	RHEL 9 : libsoup (RHSA-2026:13978)	Nessus	Red Hat Local Security Checks	high
312655	RHEL 8 : libsoup (RHSA-2026:14087)	Nessus	Red Hat Local Security Checks	high
309074	Linux Distros Unpatched Vulnerability : CVE-2026-5119	Nessus	Misc.	high

Detections

Analytics

CVE-2026-5119

high

Tenable Plugins

high

high

high

high

high

high

high

high

high