In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.
Exploitability
AV:LAC:HPR:NUI:NScope
S:UImpact
C:NI:NA:L2.9/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:LOther