AIKIDO-2025-10843
streamdown is vulnerable to Inefficient Regular Expression Complexity
30
Low Risk
This Affects:
streamdownTL;DR
Affected versions of this package are vulnerable to regular expression denial of service (ReDoS) due to inefficient patterns in parse-incomplete-markdown.ts. These expressions allow crafted input to trigger excessive backtracking and degrade performance. The fix removes the vulnerable regexes and replaces them with safer, deterministic string-based parsing logic for handling incomplete links, images, and other partial markdown constructs, eliminating the risk of ReDoS.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
streamdown is vulnerable to Inefficient Regular Expression Complexity in versions 0.0.1 - 1.5.1.
How to fix this
Upgrade the streamdown library to the patch version.
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SOC 2Compliant
ISO 27001Compliant