# Umami v2.20.1

- Product: Umami (https://whatsnew.fyi/product/umami)
- Vendor: Umami Software
- Date: 2025-12-07
- Version: v2.20.1
- Original notes: https://github.com/umami-software/umami/releases/tag/v2.20.1
- Permalink: https://whatsnew.fyi/product/umami/releases/v2.20.1

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **security** — Address Next.js CVE-2025-66478 by updating affected React versions
- **fixed** — Fix Docker build issues

This is a patch release to address the Next.js [CVE](https://nextjs.org/blog/CVE-2025-66478). The previous release did not update the affected React versions, only Next.js. This release also fixes some Docker build issues.