CVE-2025-40934 – XML-Sig prior to 0.68 for Perl improperly validates XML without signatures

The following table lists the changes that have been made to the
CVE-2025-40934 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 9b29abf9-4ab0-4765-b253-1875cd9b441e

    Nov. 26, 2025

    Action Type Old Value New Value
    Added Description XML-Sig versions 0.27 through 0.67 for Perl incorrectly validates XML files if signatures are omitted.

    An attacker can remove the signature from the XML document to make it pass the verification check.

    XML-Sig is a Perl module to validate signatures on XML files.  An unsigned XML file should return an error message.  The affected versions return true when attempting to validate an XML file that contains no signatures.

    Added CWE CWE-347
    Added Reference https://github.com/perl-net-saml2/perl-XML-Sig/issues/63
    Added Reference https://github.com/perl-net-saml2/perl-XML-Sig/pull/64
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