CVE-2025-59717: @digitalocean/do-markdownit has Type Confusion vulnerability

September 19, 2025 (updated September 22, 2025)

Supplying crafted input can bypass intended allow-lists (e.g., class/environment constraints) due to substring checks, which may enable rendering of unintended classes or environments and lead to policy bypass in downstream consumers.

References

gist.github.com/thesmartshadow/dd19665f1f51a4e3c7a766e70c9eafd0
github.com/advisories/GHSA-2h8j-8r9p-849f
github.com/digitalocean/do-markdownit
nvd.nist.gov/vuln/detail/CVE-2025-59717
www.npmjs.com/package/@digitalocean/do-markdownit

Code Behaviors & Features

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