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Vulnerability Database · crates.io · Package report

mimalloc: vulnerability history, versions and safety

mimalloc is a package in the crates.io ecosystem. Vulert records 2 vulnerabilities for it across 39 releases, from Nov 2022 to Nov 2024. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.

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2 vulnerabilities recorded M1 U1
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0 with no fix published

Every vulnerability has a patched version to move to.

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0 in the last 12 months

Nothing new recorded in the last year.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all mimalloc vulnerabilities

Vulert verdict on mimalloc 0.1.52 i

Updated on 23 Oct 2026

Good news: 0.1.52, the version you would install today, has no known vulnerabilities. Older releases do — the table below lists all 2.

Package health score 76/100
  • Security Minor issues
  • Maintenance Sustainable
  • Popularity Widely used
  • Community Quiet

What to do: Stay on 0.1.52 or newer. This can change: a vulnerability disclosed tomorrow can affect 0.1.52 too — Vulert watches the package and alerts you if that happens. Monitor it with Vulert →

  • Current release 0.1.52 — unaffected i
  • Vulnerabilities on record 2 over 1 year · 0 in the last year i
  • Latest disclosure 12 Nov 2024 i
  • Highest CVSS 5.5 i
  • With no published fix 0 i
  • Depended on by 185 packages i
  • Stars 837 i
  • OpenSSF scorecard 2/10 i
  • Last release 5 months ago i
  • Licence MIT i

Version list, release dates, licence and dependants published by crates.io, refreshed 23 Oct 2026. Licence information is not legal advice.

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01 Versions

Which versions are affected

Every version Vulert tracks for mimalloc, newest first, with the vulnerabilities recorded against each one. A version showing none has no vulnerability in the Vulert database — open it for the full picture on that release.

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Version Released Vulert vulnerabilities Licence Fix published Details
0.1.52 22 May 2026 none MIT — Details →
0.1.51 20 May 2026 none MIT — Details →
0.1.50 22 Apr 2026 none MIT — Details →
0.1.49 19 Apr 2026 none MIT — Details →
0.1.48 26 Aug 2025 none MIT — Details →
0.1.47 16 Jun 2025 none MIT — Details →
0.1.46 07 Apr 2025 none MIT — Details →
0.1.45 02 Apr 2025 none MIT — Details →
0.1.44 18 Mar 2025 none MIT — Details →
0.1.43 23 Jun 2024 none MIT — Details →
0.1.42 20 May 2024 none MIT — Details →
0.1.41 22 Apr 2024 none MIT — Details →
0.1.40 22 Apr 2024 none MIT — Details →
0.1.39 14 Sep 2023 none MIT — Details →
0.1.38 25 Aug 2023 M1 U1 MIT Yes Details →
0.1.37 25 Apr 2023 M1 U1 MIT Yes Details →
0.1.36 04 Apr 2023 M1 U1 MIT Yes Details →
0.1.35 01 Apr 2023 M1 U1 MIT Yes Details →
0.1.34 07 Jan 2023 M1 U1 MIT Yes Details →
0.1.33 07 Jan 2023 M1 U1 MIT Yes Details →
0.1.32 15 Nov 2022 M1 U1 MIT Yes Details →
0.1.31 08 Nov 2022 M1 U1 MIT Yes Details →
0.1.30 13 Oct 2022 M1 U1 MIT Yes Details →
0.1.29 30 Apr 2022 M1 U1 MIT Yes Details →
0.1.28 15 Feb 2022 M1 U1 MIT Yes Details →
0.1.27 15 Nov 2021 M1 U1 MIT Yes Details →
0.1.26 18 Jun 2021 M1 U1 MIT Yes Details →
0.1.25 06 Mar 2021 M1 U1 MIT Yes Details →
0.1.24 05 Feb 2021 M1 U1 MIT Yes Details →
0.1.23 02 Feb 2021 M1 U1 MIT Yes Details →
0.1.22 09 Oct 2020 M1 U1 MIT Yes Details →
0.1.21 27 Sep 2020 M1 U1 MIT Yes Details →
0.1.20 20 Aug 2020 M1 U1 MIT Yes Details →
0.1.19 23 Apr 2020 M1 U1 MIT Yes Details →
0.1.18 12 Mar 2020 M1 U1 MIT Yes Details →
0.1.17 19 Feb 2020 M1 U1 MIT Yes Details →
0.1.16 18 Feb 2020 M1 U1 MIT Yes Details →
0.1.15 12 Feb 2020 M1 U1 MIT Yes Details →
0.1.14 12 Feb 2020 M1 U1 MIT Yes Details →
0.1.13 11 Feb 2020 M1 U1 MIT Yes Details →
0.1.12 31 Jan 2020 M1 U1 MIT Yes Details →
0.1.11 07 Dec 2019 M1 U1 MIT Yes Details →
0.1.10 16 Oct 2019 M1 U1 MIT Yes Details →
0.1.9 24 Sep 2019 M1 U1 MIT Yes Details →
0.1.8 24 Sep 2019 M1 U1 MIT Yes Details →
0.1.7 24 Sep 2019 M1 U1 MIT Yes Details →
0.1.6 02 Sep 2019 M1 U1 MIT Yes Details →
0.1.5 02 Jul 2019 M1 U1 MIT Yes Details →
0.1.4 02 Jul 2019 M1 U1 MIT Yes Details →
0.1.3 26 Jun 2019 M1 U1 MIT Yes Details →
0.1.2 25 Jun 2019 M1 U1 MIT Yes Details →
0.1.1 25 Jun 2019 M1 U1 MIT Yes Details →
0.1.0 24 Jun 2019 M1 U1 MIT Yes Details →

All 53 versions Vulert tracks for this package. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2022 1
  • 2024 1

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 0 of the 2 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for mimalloc

The 2 most severe of 2 vulnerabilities recorded for this package

Search all 2 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
Memory Alignment Issue in Mimalloc Package: Potential Performance Degradation 5.5 medium 0.1.39 12 Nov 2024
Memory Alignment Vulnerability in Mimalloc Package: Improper Allocation Handling N/A unrated 0.1.39 23 Nov 2022

Vulnerability wrong, a fix missing, or a package we should cover? Report it and we will fix the record. Report Vulnerability Provide Feedback

Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315

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Questions

About mimalloc

Is mimalloc safe to use?

Vulert records 2 vulnerabilities for mimalloc in crates.io: 0 critical, 0 high, 1 medium and 0 low, plus 1 not yet rated. Every one of them has a published fix, so the practical answer is to run a supported release and keep it patched.

What is mimalloc's Vulert package health score?

Vulert scores mimalloc 76/100, which reads as in good shape. The score weighs the vulnerability record (40), maintenance and release cadence (25), adoption from dependents and stars (20) and community signals such as the OpenSSF scorecard and forks (15).

Is the latest version of mimalloc affected?

No. 0.1.52, the version you would install today, has no vulnerabilities on record against it. Earlier releases do — the version table above lists each release with what affects it.

Which version of mimalloc should I use?

0.1.52 is the version Vulert recommends for the affected releases. The version table above lists every release with the vulnerabilities recorded against it, so you can confirm the range you actually run.

How many vulnerabilities does mimalloc have?

2 vulnerabilities are recorded for mimalloc in the crates.io ecosystem: 0 critical, 0 high, 1 medium and 0 low, plus 1 not yet rated. The ledger on this page lists the same counts next to the date of the most recent disclosure.

How often are new mimalloc vulnerabilities disclosed?

0 vulnerabilities were recorded for mimalloc in the last 12 months, and the oldest entry in this database dates to 23 Nov 2022. Recency matters more than a lifetime total: it shows how actively new issues are being disclosed for the package you are considering.

Which versions of mimalloc are affected?

Each vulnerability on this page lists the affected version range and the fixed version to move to. Open the vulnerability for the version you actually run — fixes are specific to a release line, not to the package as a whole.

How do I monitor mimalloc for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the mimalloc version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.