AIKIDO-2026-542208
dbus-fast is vulnerable to Denial of Service (DoS)
41
Medium Risk
This Affects:
dbus-fastTL;DR
The introspection XML parser in introspection.py recursively parses nested <node> elements via Node.from_xml without bounding the recursion depth. Introspection XML is parsed from the reply to an org.freedesktop.DBus.Introspectable.Introspect call, so a hostile or buggy peer can return a document with deeply nested <node> elements and exhaust the Python (or C) stack, crashing the consuming process. The fix routes parsing through Node._from_xml with a depth counter and raises InvalidIntrospectionError once nesting exceeds _MAX_NODE_DEPTH (32).
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
dbus-fast is vulnerable to Denial of Service (DoS) in versions 1.0.0 - 5.0.1.
How to fix this
Upgrade the dbus-fast library to the patch version.
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SOC 2Compliant
ISO 27001CompliantISO 42001Compliant
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