Mithril update 2025-02-19 (#542)

* Mithril update 2025-02-19

* Update blog/2025-02-19-mithril.md

Co-authored-by: olgahryniuk <67585499+olgahryniuk@users.noreply.github.com>

---------

Co-authored-by: olgahryniuk <67585499+olgahryniuk@users.noreply.github.com>

Author: jpraynaud

blog/2025-02-19-mithril.md

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+---
+title: Mithril Team Update
+slug: 2025-02-19-mithril
+authors: jpraynaud
+tags: [mithril]
+hide_table_of_contents: false
+---
+
+## High level overview
+
+This week, the Mithril team released the new distribution [`2506.0`](https://github.com/input-output-hk/mithril/releases/tag/2506.0), which fixes a certificate chain security issue discussed in this [developer blog post](https://mithril.network/doc/dev-blog/2025/02/14/client-security-advisory)
+
+The team continued implementing incremental certification of the Cardano database, completed the client library, client CLI, and monitoring, fixed bugs, and worked on unstable features. Additionally, they worked on decommissioning the `testing-sanchonet` Mithril network and ending support for macOS x64 pre-built binaries in the CI.
+
+Finally, the team fixed all remaining flakiness in end-to-end tests in the CI and worked on cleaning up legacy code from the 'Thales' era.
+
+## Low level overview
+
+- Released the new distribution [`2506.0`](https://github.com/input-output-hk/mithril/releases/tag/2506.0)
+- Published the security advisory **Mithril certificate chain could be manipulated by an adversarial signer** [#GHSA-724h-fpm5-4qvr](https://github.com/input-output-hk/mithril/security/advisories/GHSA-724h-fpm5-4qvr)
+- Published a [dev blog post](https://mithril.network/doc/dev-blog/2025/02/14/client-security-advisory) about the **Mithril certificate chain security advisory**
+- Published a [dev blog post](https://mithril.network/doc/dev-blog/2025/02/14/distribution-2506) about the **Distribution `2506` availability**
+- Published a [dev blog post](https://mithril.network/doc/dev-blog/2025/02/18/testing-sanchonet-decommission) about the **Decommission of the `testing‑sanchonet` network**
+- Published a [dev blog post](https://mithril.network/doc/dev-blog/2025/02/18/end-of-support-macos-x64) about the **End of support for macOS x64 pre-built binaries**
+- Completed the issue **Release `2506` distribution** [#2207](https://github.com/input-output-hk/mithril/issues/2207)
+- Completed the issue **Implement Incremental Cardano DB in client library** [#2214](https://github.com/input-output-hk/mithril/issues/2214)
+- Completed the issue **Implement Incremental Cardano DB in client CLI** [#2246](https://github.com/input-output-hk/mithril/issues/2246)
+- Completed the issue **Implement monitoring for Incremental Cardano DB** [#2249](https://github.com/input-output-hk/mithril/issues/2249)
+- Completed the issue **Flakiness in e2e tests in CI** [#2222](https://github.com/input-output-hk/mithril/issues/2222)
+- Completed the issue **`testing-sanchonet` network decommission** [#2296](https://github.com/input-output-hk/mithril/issues/2296)
+- Completed the issue **Upgrade the deprecated `ubuntu-20` builders in CI** [#2216](https://github.com/input-output-hk/mithril/issues/2216)
+- Completed the issue **End of support for MacOS `x64` builds in the CI** [#2250](https://github.com/input-output-hk/mithril/issues/2250)
+- Completed the issue **Digests file for Incremental Cardano DB is not updated on the cloud location** [#2306](https://github.com/input-output-hk/mithril/issues/2306)
+- Completed the issue **Split `mithril-common` crate - Phase 1** [#2294](https://github.com/input-output-hk/mithril/issues/2294)
+- Worked on the issue **Hydra CI fails with `OpenSSL` error on Linux x86_64 runners** [#2295](https://github.com/input-output-hk/mithril/issues/2295)
+- Worked on the issue **Enhance artifact structure for Incremental Cardano DB** [#2291](https://github.com/input-output-hk/mithril/issues/2291)
+- Worked on the issue **Support evolving cloud artifact locations type to avoid client breaking change** [#2293](https://github.com/input-output-hk/mithril/issues/2293)
+- Worked on the issue **Cleanup legacy code following `Pythagoras` era activation** [#2316](https://github.com/input-output-hk/mithril/issues/2316)