XML::Sig versions from 0.29 before 0.72 for Perl allow signature verification bypass because verify returns true when every signature was skipped before any cryptographic check.
CVSS 3.1HIGH 7.5·Network·No auth·No interaction·EPSS 0.00319·Published 2026-08-03·Fixed in 0.72CWE-347
It was discovered that the XML::Atom Perl module before version 0.39 did not disable external entities when parsing XML from potentially untrusted sources.