The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to 0.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-104940 advisory.

    The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if     (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can     send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-     based client when max_incoming_payload_size is set to0.

Tenable has extracted the preceding description block directly from the Unity 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 Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-f3ca65c0c9 advisory.

    Fix for several CVEs

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

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

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c8cfd2f2f9 advisory.

    Patches for several CVEs

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

Note that Nessus has not tested for these issues 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.

  - The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if     (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can     send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-     based client when max_incoming_payload_size is set to 0. (CVE-2026-12478)

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

ID	Name	Product	Family	Type	Severity
341435	Unity Linux 20.1070e Security Update: libsoup (UTSA-2026-104940)	Nessus	Unity Linux Local Security Checks	Local	medium
341036	Fedora 43 : libsoup3 (2026-f3ca65c0c9)	Nessus	Fedora Local Security Checks	Local	high
335488	Fedora 44 : libsoup3 (2026-c8cfd2f2f9)	Nessus	Fedora Local Security Checks	Local	high
326724	Linux Distros Unpatched Vulnerability : CVE-2026-12478	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-12478

medium

Tenable Plugins

medium

high

high

medium