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Rust Miri in GitHub Actions may leak CI secrets

A security researcher says running Rust Miri in CI can leak secrets, recommends upgrading to the 2026-09-22 nightly, clearing caches and rotating secrets, and notes GPT-6 Astra helped find the issue.

Predrag Gruevski

@PredragGruevskiArchived 2026.09.22Originally posted 2026.09.22

Rust Miri in GitHub Actions may leak CI secrets

Predrag Gruevski @PredragGruevskiOriginally posted 2026.09.22

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GitHub Actions + Rust's Miri can leak your secrets in CI 🧵 If you run Miri in CI: - upgrade to the 2026-09-22 nightly - clear caches - rotate any secrets that the `cargo miri` CI job had access to GPT-6 Astra helped find this 🦀

x.com/predraggruevski/status/2102126581833519302Archived 2026.09.22 10:17