GHSA-x8jh-xj3x-gx3c: `fast-float` has multiple soundness issues

November 12, 2024 (updated October 31, 2025)

fast-float contains multiple soundness issues:

Undefined behavior when checking input length, which has been merged but no package pubished.
Many functions marked as safe with non-local safety guarantees

The library is also unmaintained.

References

github.com/advisories/GHSA-x8jh-xj3x-gx3c
github.com/aldanor/fast-float-rust
github.com/aldanor/fast-float-rust/issues/28
github.com/aldanor/fast-float-rust/issues/35
github.com/aldanor/fast-float-rust/issues/37
rustsec.org/advisories/RUSTSEC-2024-0379.html

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