# Ubuntu 26.10 Begins Rolling Out upki Support For Certificate Revocation

Source: [Phoronix](https://www.phoronix.com/news/Ubuntu-26.10-Does-upki) · 2026-11-11 · Cloud & DevOps
Page: https://themorning.dev/story/ubuntu-26-10-begins-rolling-out-upki-support-for-certificate-revocation-1f83b0a8b1b6d560
Kind: release · Impact: medium

## In brief

- Ubuntu 26.10 ships curl with certificate revocation checking built in, using upki, a project from the rustls developers.
- The upki revocation check was enabled only for Ubuntu 26.10's curl package because of a late change, with more plans ahead.
- In Ubuntu's test, the same curl command accepted a revoked certificate on 26.04 but refused it on 26.10.

## Why it matters

curl on Ubuntu 26.10 can now reject servers presenting revoked certificates that older releases accepted, which may break scripts or workflows that depend on those connections.

## Versions

- Ubuntu 26.10
- Ubuntu 26.04

## Coverage

- [Ubuntu certificate revocation checks arrive in curl, OpenSSL is next](https://www.helpnetsecurity.com/2026/11/11/ubuntu-certificate-revocation-curl-openssl/) — Help Net Security, 2026-11-11
- [Ubuntu 26.10 Begins Rolling Out upki Support For Certificate Revocation](https://www.phoronix.com/news/Ubuntu-26.10-Does-upki) — Phoronix, 2026-11-11

Tags: ubuntu, curl, certificate-revocation, tls, upki

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Dev – https://themorning.dev