CVE-2025-40934

CVE-2025-40934 affects the Perl module XML-Sig (versions 0.27–0.67). Multiple sources confirm that unsigned XML files are incorrectly validated: an attacker can remove a signature and have the validator return true, bypassing verification. Red Hat, EU/ENISA, OSV, NVD, and security trackers corrob...

CVE-2026-9390

CVE-2026-9390 affects XML::Sig (Perl) versions before 0.71. The issue arises when verify()/_get_signed_xml() build XPath expressions by concatenating SignedInfo/Reference/@URI from the document without escaping or enforcing NCName rules. A URI containing a single quote can terminate the string li...

CVE-2026-18568

XML::Sig for Perl versions prior to 0.72 is vulnerable: verify() can return true without performing any digest or signature checks when multiple signatures are present or id_attr mismatch occurs, effectively bypassing signature verification. Affected range includes 0.29–0.71 (up to 0.28 is not af...

CVE-2026-9487

CVE-2026-9487 affects XML::Sig for Perl up to version 0.70. The vulnerability arises because _get_signed_xml() resolves IDs with the XPath //*[@ID='$id'] and accepts two elements sharing the same ID, causing signature wrapping: the digest and signature are validated against the first element in d...