CVE-2006-10003: Toddr Xml::parser

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack. In the case (stackptr == stacksize - 1), the stack will NOT be expanded. Then the new value will be written at location (++stackptr), which equals stacksize and therefore falls just outside the allocated buffer. The bug can be observed when parsing an XML file with very deep element nesting

Affected products

• Toddr Xml::parser: before 2.48 (fixed in 2.48)

Published 2026-03-19. Last modified 2026-07-15.