Marshmallow

We pull the official changelog, sanitize it, and organize it into a uniform list. Follow each entry URL to read the original on the vendor site.

1. Aug 8, 2026
   4.3.1

   20 days ago
2. Apr 3, 2026
   4.3.0

   5 months ago
3. Apr 2, 2026
   4.2.4

   5 months ago
4. Mar 25, 2026
   4.2.3

   5 months ago
5. Feb 4, 2026
   4.2.2

   7 months ago
6. Jan 23, 2026
   4.2.1

   7 months ago
7. Jan 4, 2026
   4.2.0

   8 months ago
8. Dec 22, 2025
   3.26.2: Merge pull request #2878 from marshmallow-code/3.x-mypy-unreachable

   8 months ago
9. 4.1.2: Merge pull request #2876 from marshmallow-code/delint

   8 months ago
10. Dec 5, 2025
    4.1.1

    9 months ago

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