The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-130395 advisory.

    Unity Link Advisory UTSA-2026-130395

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 Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8925-1 advisory.

    Dominique Dumont discovered that YAML-LibYAML did not correctly handle certain reflection operations. If a     user or system were tricked into opening a specially crafted file, an attacker could possibly use this     issue to delete files. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2017-20285)

    It was discovered that YAML-LibYAML did not correctly handle parsing certain documents. If a user or     automated system were tricked into opening a specially crafted file, an attacker could possibly use this     issue to execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.
    (CVE-2019-25777)

    It was discovered that YAML-LibYAML contained a regular expression susceptible to catastrophic     backtracking. If a user or automated system were tricked into opening a specially crafted file, an     attacker could possibly use this issue to cause a denial of service. (CVE-2026-63676)

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

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  CVE-2026-63676


The version of perl-YAML installed on the remote host is prior to 0.84-5. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3918 advisory.

    Backtracking leads to exponential load time in libyaml library. (CVE-2026-63676)

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

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

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-2151 advisory.

    Backtracking leads to exponential load time in libyaml library. (CVE-2026-63676)

Tenable has extracted the preceding description block directly from the tested product 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.

  - Unity Link Advisory UTSA-2026-130395 (CVE-2026-63676) (CVE-2026-63676)

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

ID	Name	Product	Family	Type	Severity
366280	Unity Linux 20.1070e Security Update: perl-YAML (UTSA-2026-130395)	Nessus	Unity Linux Local Security Checks	Local	high
366021	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : YAML-LibYAML vulnerabilities (USN-8925-1)	Nessus	Ubuntu Local Security Checks	Local	critical
458490	Echo: libyaml-perl: security update to 1.31-1+e1	Tenable Cloud Security	Echo Local Security Checks	Local	high
458490	Echo: libyaml-perl: security update to 1.31-1+e1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
345789	Amazon Linux 2 : perl-YAML (ALAS-2026-3918)	Nessus	Amazon Linux Local Security Checks	Local	high
345781	Amazon Linux 2023 : perl-YAML, perl-YAML-tests (ALAS2023-2026-2151)	Nessus	Amazon Linux Local Security Checks	Local	high
339666	Linux Distros Unpatched Vulnerability : CVE-2026-63676	Nessus	Misc.	Local	critical
445228	Alpine: multiple perl-yaml packages: security update to 1.320.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
445228	Alpine: multiple perl-yaml packages: security update to 1.320.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high

Detections

Analytics

CVE-2026-63676

high

Tenable Plugins

high

critical

high

high

high

high

critical

high

high