How severe is GHSA-x8jh-xj3x-gx3c?

No CVSS score has been assigned to GHSA-x8jh-xj3x-gx3c yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-x8jh-xj3x-gx3c?

GHSA-x8jh-xj3x-gx3c affects the following packages: fast-float (crates.io). Ecosystems affected: crates.io.

How do I fix GHSA-x8jh-xj3x-gx3c?

The records we use list no patched version of fast-float for GHSA-x8jh-xj3x-gx3c. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

How do I detect GHSA-x8jh-xj3x-gx3c in my crates.io dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for fast-float, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-x8jh-xj3x-gx3c if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-x8jh-xj3x-gx3c actively exploited in the wild?

No public exploit code has been indexed for GHSA-x8jh-xj3x-gx3c yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-x8jh-xj3x-gx3c published, and has it been updated?

GHSA-x8jh-xj3x-gx3c was published on November 12, 2024 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🦀 crates.io

Not in CISA KEV

`fast-float` has multiple soundness issuesGHSA-x8jh-xj3x-gx3c

GHSA-x8jh-xj3x-gx3c is a security vulnerability in fast-float. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Also known asRUSTSEC-2024-0379

Published

Nov 12, 2024

Updated

Sep 10, 2026

Affected

1 pkg

Patched

None yet

Exploits

None indexed

Exploitation data as of Sep 10, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🦀fast-float

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

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.

Alternatives

For quickly parsing floating-point numbers third-party crates are generally no longer needed. A fast float parsing algorithm by the author of lexical has been merged into libcore. When requiring direct parsing from bytes and/or partial parsers, the fast-float2 fork of fast-float containing these security patches and reduces overall usage of unsafe.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🦀crates.io	`fast-float`	all versions	No fix

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for fast-float, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
The records we use list no patched version of fast-float for GHSA-x8jh-xj3x-gx3c. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

`fast-float` contains multiple soundness issues: 1. [Undefined behavior when checking input length](https://github.com/aldanor/fast-float-rust/issues/28), which has been merged but no package [pubished](https://github.com/aldanor/fast-float-rust/issues/35). 1. [Many functions marked as safe with non-local safety guarantees](https://github.com/aldanor/fast-float-rust/issues/37) The library is also unmaintained. ## Alternatives For quickly parsing floating-point numbers third-party crates are generally no longer needed. A fast float parsing algorithm by the author of `lexical` has been [me

O3 Security · Impact-Aware SCA

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