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CRITICAL severity

Use of Uninitialized Resource in binjs_ioGHSA-cw4j-cf6c-mmfv

CRITICAL

GHSA-cw4j-cf6c-mmfv is a critical-severity (CVSS 9.8) CWE-908 vulnerability in binjs_io. No vendor fix is recorded yet; mitigation options are listed below.

Also known asCVE-2021-45683GHSA-c6px-4grw-hrjrRUSTSEC-2021-0085
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs67th percentile — riskier than 67% of all scored CVEsHighest risk
0.00%0.56%1.13%1.69%0.4%0.4%0.4%1.2%1.2%Apr 26Jun 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-cw4j-cf6c-mmfv by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🦀binjs_io

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

An issue was discovered in the binjs_io crate through 2021-01-03 for Rust. The Read method may read from uninitialized memory locations.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🦀crates.iobinjs_ioall versionsNo fix

Affected Products

1 product · 1 configurations
Application
binjs iobinjs_io_project
1 version
0.2.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Remediation status

    No patched version of binjs_io has shipped for GHSA-cw4j-cf6c-mmfv yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. 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

An issue was discovered in the binjs_io crate through 2021-01-03 for Rust. The Read method may read from uninitialized memory locations.
O3 Security · Impact-Aware SCA

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Use of Uninitialized Resource in binjs_io (Critical 9.8)