DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation allows forbidden tags to bypass FORBID_TAGS restrictions. Attackers can craft input containing tags listed in FORBID_TAGS that are also added via ADD_TAGS function, causing them to be retained in sanitized output.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3942ab86fd advisory.

    See https://github.com/jupytext/jupytext/blob/main/CHANGELOG.md for changes in versions 1.19.5 and 1.19.6.
    For this update, a patch has been applied that reverses the jupyterlab  jupyter-builder change for     Fedora releases  45, since jupyter-builder is only available in F46 and later.  Many CVEs have been     fixed in this 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.

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

  - DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation
    allows forbidden tags to bypass FORBID_TAGS restrictions. Attackers can craft input containing tags listed
    in FORBID_TAGS that are also added via ADD_TAGS function, causing them to be retained in sanitized output.
    (CVE-2026-65903)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-625cbe86c8 advisory.

    34.0.3 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 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-a1368a72b4 advisory.

    34.0.3 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.

  - DOMPurify before 3.4.0 contains a logic error in the ADD_TAGS function where short-circuit evaluation     allows forbidden tags to bypass FORBID_TAGS restrictions. Attackers can craft input containing tags listed     in FORBID_TAGS that are also added via ADD_TAGS function, causing them to be retained in sanitized output.
    (CVE-2026-65903)

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

ID	Name	Product	Family	Type	Severity
365513	Fedora 43 : python-jupytext (2026-3942ab86fd)	Nessus	Fedora Local Security Checks	Local	high
460786	Echo: dompurify: security update to 3.4.0	Tenable Cloud Security	Echo Local Security Checks	Local	medium
460786	Echo: dompurify: security update to 3.4.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
339195	Fedora 43 : nextcloud (2026-625cbe86c8)	Nessus	Fedora Local Security Checks	Local	medium
339193	Fedora 44 : nextcloud (2026-a1368a72b4)	Nessus	Fedora Local Security Checks	Local	medium
329648	Linux Distros Unpatched Vulnerability : CVE-2026-65903	Nessus	Misc.	Local	medium
440474	SCA: security update for dompurify (GHSA-39q2-94rc-95cp)	Tenable Cloud Security	SCA Checks	Local	medium
440474	SCA: security update for dompurify (GHSA-39q2-94rc-95cp)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-65903

medium

Tenable Plugins

high

medium

medium

medium

medium

medium

medium

medium