AIKIDO-2026-547546
mdex_native is vulnerable to Unbounded memory allocation
69
Medium Risk
This Affects:
mdex_nativeTL;DR
mdex_native allows unbounded memory allocation when rendering Markdown that contains a fenced code block with an oversized highlight_lines range in its info string. The native adapter (LumisAdapter::parse_highlight_lines in lumis_adapter.rs) eagerly expands the attacker-controlled inclusive line range into a Vec<usize> with no upper bound, allocating roughly 8 bytes per line.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
mdex_native is vulnerable to Unbounded memory allocation in versions 0.1.0 - 0.2.2.
How to fix this
Upgrade the mdex_native library to the patch version.
Links
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