Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection under the default configuration. Specifically, the classDef directive in Mermaid state diagrams permits DOM injection that escapes the SVG context. However, <script> tags are stripped, which prevents cross-site scripting (XSS). This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to immediately upgrade, they can work around this issue by setting "securityLevel": "sandbox", which prevents the issue by rendering the mermaid diagram in a sandboxed <iframe>.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ee50c21f92 advisory.

    33.0.6 Release

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 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-5afe6630dc advisory.

    33.0.6 Release

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.

  - Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts.
    Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection     under the default configuration. Specifically, the classDef directive in Mermaid state diagrams permits     DOM injection that escapes the SVG context. However, <script> tags are stripped, which prevents cross-site     scripting (XSS). This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to     immediately upgrade, they can work around this issue by setting securityLevel: sandbox, which prevents     the issue by rendering the mermaid diagram in a sandboxed <iframe>. (CVE-2026-41149)

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

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

  - Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts.
    Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection
    under the default configuration. Specifically, the classDef directive in Mermaid state diagrams permits
    DOM injection that escapes the SVG context. However, <script> tags are stripped, which prevents cross-site
    scripting (XSS). This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to
    immediately upgrade, they can work around this issue by setting "securityLevel": "sandbox", which prevents
    the issue by rendering the mermaid diagram in a sandboxed <iframe>. (CVE-2026-41149)

ID	Name	Product	Family	Type	Severity
325136	Fedora 44 : nextcloud (2026-ee50c21f92)	Nessus	Fedora Local Security Checks	Local	high
325111	Fedora 43 : nextcloud (2026-5afe6630dc)	Nessus	Fedora Local Security Checks	Local	high
316605	Linux Distros Unpatched Vulnerability : CVE-2026-41149	Nessus	Misc.	Local	medium
441751	SCA: security update for mermaid (GHSA-ghcm-xqfw-q4vr)	Tenable Cloud Security	SCA Checks	Local	medium
441751	SCA: security update for mermaid (GHSA-ghcm-xqfw-q4vr)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-41149

medium

Tenable Plugins

high

high

medium

medium

medium