Low (3.7). EPSS 0.5% chance of exploitation in the next 30 days.
A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.
Severity
CVSS 3.1
3.7 low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS
0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)