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Vulnerability Database · PyPI · Package report

msgpack: vulnerability history, versions and safety

msgpack is a package in the PyPI ecosystem. Vulert records 2 vulnerabilities for it across 32 releases, first recorded in Jun 2026. 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 H1 U1
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0 with no fix published

Every vulnerability has a patched version to move to.

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2 in the last 12 months

Most recent disclosure 30 Jun 2026.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all msgpack vulnerabilities

Vulert verdict on msgpack 1.2.3 i

Updated on 23 Oct 2026

Good news: 1.2.3, the version you would install today, has no known vulnerabilities. Older releases do — the table below lists all 2.

Package health score 82/100
  • Security Minor issues
  • Maintenance Sustainable
  • Popularity Key ecosystem project
  • Community Moderate

What to do: Stay on 1.2.3 or newer. This can change: a vulnerability disclosed tomorrow can affect 1.2.3 too — Vulert watches the package and alerts you if that happens. Monitor it with Vulert →

  • Current release 1.2.3 — unaffected i
  • Vulnerabilities on record 2 over 1 year · 2 in the last year i
  • Latest disclosure 30 Jun 2026 i
  • Highest CVSS 7.5 i
  • With no published fix 0 i
  • Depended on by 16,941 packages i
  • Stars 2,108 i
  • OpenSSF scorecard 5/10 i
  • Last release this month i
  • Licence Apache-2.0 i

Version list, release dates, licence and dependants published by PyPI, refreshed 22 Oct 2026. Licence information is not legal advice.

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01 Versions

Which versions are affected

Every version Vulert tracks for msgpack, 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
1.2.3 29 Sep 2026 none Apache-2.0 — Details →
1.2.2 27 Aug 2026 none Apache-2.0 — Details →
1.2.1 18 Jun 2026 none Apache-2.0 — Details →
1.2.0 11 Jun 2026 H1 U1 Apache-2.0 Yes Details →
1.2.0rc1 03 Jun 2026 H1 U1 Apache-2.0 Yes Details →
1.1.2 08 Oct 2025 H1 U1 Apache-2.0 Yes Details →
1.1.1 13 Jun 2025 H1 U1 Apache-2.0 Yes Details →
1.1.1rc1 06 Jun 2025 H1 U1 Apache-2.0 Yes Details →
1.1.0 10 Sep 2024 H1 U1 Apache-2.0 Yes Details →
1.1.0rc2 19 Aug 2024 H1 U1 Apache-2.0 Yes Details →
1.1.0rc1 07 May 2024 H1 U1 Apache-2.0 Yes Details →
1.0.8 01 Mar 2024 H1 U1 Apache-2.0 Yes Details →
1.0.7 28 Sep 2023 H1 U1 Apache-2.0 Yes Details →
1.0.6 21 Sep 2023 H1 U1 Apache-2.0 Yes Details →
1.0.6rc1 13 Sep 2023 H1 U1 Apache-2.0 Yes Details →
1.0.5 08 Mar 2023 H1 U1 Apache-2.0 Yes Details →
1.0.5rc1 18 Jan 2023 H1 U1 Apache-2.0 Yes Details →
1.0.4 03 Jun 2022 H1 U1 Apache-2.0 Yes Details →
1.0.4rc1 25 May 2022 H1 U1 Apache-2.0 Yes Details →
1.0.3 24 Nov 2021 H1 U1 Apache-2.0 Yes Details →
1.0.3rc1 19 Nov 2021 H1 U1 Apache-2.0 Yes Details →
1.0.2 18 Dec 2020 H1 U1 Apache-2.0 Yes Details →
1.0.1 11 Dec 2020 H1 U1 Apache-2.0 Yes Details →
1.0.0 18 Feb 2020 H1 U1 Apache-2.0 Yes Details →
1.0.0rc1 12 Dec 2019 H1 U1 Apache-2.0 Yes Details →
0.6.2 20 Sep 2019 H1 U1 Apache-2.0 Yes Details →
0.6.1 25 Jan 2019 H1 U1 Apache-2.0 Yes Details →
0.6.0 04 Dec 2018 H1 U1 Apache-2.0 Yes Details →
0.5.6 23 Feb 2018 H1 U1 Apache-2.0 Yes Details →
0.5.5 22 Feb 2018 H1 U1 Apache-2.0 Yes Details →
0.5.4 05 Feb 2018 H1 U1 Apache-2.0 Yes Details →
0.5.3 03 Feb 2018 H1 U1 Apache-2.0 Yes Details →
0.5.2 02 Feb 2018 H1 U1 Apache-2.0 Yes Details →
0.5.1 09 Jan 2018 H1 U1 Apache-2.0 Yes Details →
0.5.0 06 Jan 2018 H1 U1 Apache-2.0 Yes Details →

All 35 versions Vulert tracks for this package. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2026 2

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

03 Vulnerabilities

Recorded vulnerabilities for msgpack

The 2 most severe of 2 vulnerabilities recorded for this package

Search all 2 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
Out-of-Bounds Read Vulnerability in MessagePack for Python: SEGV Risk on Unpacker Reuse 7.5 high 1.2.1 19 Jun 2026
CVE-2026-57585: msgpack Package Suffers from Out-of-Bounds Read Vulnerability Leading to Potential DoS 7.5 high 1.2.1 30 Jun 2026

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 msgpack

Is msgpack safe to use?

Vulert records 2 vulnerabilities for msgpack in PyPI: 0 critical, 1 high, 0 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 msgpack's Vulert package health score?

Vulert scores msgpack 82/100, 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 msgpack affected?

No. 1.2.3, 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 msgpack should I use?

1.2.3 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 msgpack have?

2 vulnerabilities are recorded for msgpack in the PyPI ecosystem: 0 critical, 1 high, 0 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 msgpack vulnerabilities disclosed?

2 vulnerabilities were recorded for msgpack in the last 12 months, and the oldest entry in this database dates to 19 Jun 2026. 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 msgpack 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 msgpack for upcoming vulnerabilities?

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