# Certbot 5.10.0 Release

**URL:** <https://community.letsencrypt.org/t/certbot-5-10-0-release/252935>\
**Category:** Client dev\
**Created:** [November 10, 2026, 11:50pm UTC](https://community.letsencrypt.org/t/certbot-5-10-0-release/252935 "2026-11-10T23:50:15Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![wgreenberg](https://avatars.discourse-cdn.com/v4/letter/w/5f8ce5/32.png) [@wgreenberg](https://community.letsencrypt.org/u/wgreenberg)\
**Post date:** [November 10, 2026, 11:50pm UTC](https://community.letsencrypt.org/t/certbot-5-10-0-release/252935/1 "2026-11-10T23:50:15Z")

</div>

Certbot 5.10.0 has just been released. The changelog for the release is:

### Fixed

- Fixes a race condition in the webroot plugin where, if the webroot could be modified by a less privileged user while Certbot ran, the ownership and mode of an unintended file could be changed instead of those of the challenge directory Certbot had just created.
- Rejects invalid ARI suggested renewal windows whose end time is not after their start time.