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Vulnerability Database · PyPI · Package report

flask-caching: vulnerability history, versions and safety

flask-caching is a package in the PyPI ecosystem. Vulert records 2 vulnerabilities for it across 32 releases, from May 2021 to Jun 2021. 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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2 with no fix published

No patched version yet — these are the ones to plan around.

See the unfixed vulnerabilities →
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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 flask-caching vulnerabilities

Vulert verdict on flask-caching 2.5.1 i

Updated on 23 Oct 2026

Careful: 2.5.1 has 2 known vulnerabilities, and 2 have no fix yet. Use an earlier safe version, or the workaround listed for each one.

Package health score 60/100
  • Security Minor issues
  • Maintenance Sustainable
  • Popularity Widely used
  • Community Moderate

The current release has a vulnerability with no published fix, which caps this score.

What to do: Pin an earlier, unaffected release if you can, and apply the workaround each vulnerability lists until a fix is published. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →

  • Current release 2.5.1 — affected i
  • Vulnerabilities on record 2 over 1 year · 0 in the last year i
  • Latest disclosure 18 Jun 2021 i
  • Highest CVSS 4.2 i
  • With no published fix 2 i
  • Depended on by 282 packages i
  • Stars 931 i
  • OpenSSF scorecard 5/10 i
  • Last release 1 month ago i
  • Licence BSD-3-Clause i

Version list, release dates, licence and dependants published by PyPI, 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 flask-caching, 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
2.5.1 04 Sep 2026 M1 U1 BSD-3-Clause No Details →
2.5.0 24 Aug 2026 M1 U1 BSD-3-Clause No Details →
2.4.1 08 Jul 2026 M1 U1 BSD-3-Clause No Details →
2.4.0 17 Apr 2026 M1 U1 BSD-3-Clause No Details →
2.3.1 23 Feb 2025 M1 U1 non-standard No Details →
2.3.0 04 May 2024 M1 U1 non-standard No Details →
2.2.0 27 Apr 2024 M1 U1 non-standard No Details →
2.1.0 08 Oct 2023 M1 U1 non-standard No Details →
2.0.2 12 Jan 2023 U1 non-standard No Details →
2.0.1 30 Jul 2022 U1 non-standard No Details →
2.0.0 26 Jun 2022 U1 non-standard No Details →
1.11.1 28 May 2022 U1 non-standard No Details →
1.11.0 28 May 2022 U1 non-standard No Details →
1.10.1 17 Mar 2021 M1 U1 non-standard No Details →
1.10.0 04 Mar 2021 M1 U1 non-standard No Details →
1.9.0 02 Jun 2020 M1 U1 non-standard No Details →
1.8.0 24 Nov 2019 M1 U1 non-standard No Details →
1.7.2 28 May 2019 M1 U1 non-standard No Details →
1.7.1 16 Apr 2019 M1 U1 non-standard No Details →
1.7.0 29 Mar 2019 M1 U1 non-standard No Details →
1.6.0 06 Mar 2019 M1 U1 non-standard No Details →
1.5.0 23 Feb 2019 M1 U1 non-standard No Details →
1.4.0 16 Apr 2018 M1 U1 non-standard No Details →
1.3.3 05 Oct 2017 M1 U1 non-standard No Details →
1.3.2 25 Jun 2017 M1 U1 non-standard No Details →
1.3.1 20 Jun 2017 M1 U1 non-standard No Details →
1.3.0 17 Jun 2017 M1 U1 non-standard No Details →
1.2.0 02 Feb 2017 M1 U1 non-standard No Details →
1.1.1 09 Dec 2016 M1 U1 non-standard No Details →
1.1.0 09 Dec 2016 M1 U1 non-standard No Details →
1.0.1 30 Aug 2016 M1 U1 non-standard No Details →
1.0.0 04 Jul 2016 M1 U1 non-standard No Details →

All 32 versions Vulert tracks for this package. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2021 2

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 flask-caching

The 2 most severe of 2 vulnerabilities recorded for this package

Search all 2 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
CVE-2021-33026: Deserialization of Untrusted Data in Flask-Caching 4.2 medium No fix published 18 Jun 2021
CVE-2021-33026: Flask-Caching Remote Code Execution Vulnerability N/A unrated No fix published 13 May 2021

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 flask-caching

Is flask-caching safe to use?

Vulert records 2 vulnerabilities for flask-caching in PyPI: 0 critical, 0 high, 1 medium and 0 low, plus 1 not yet rated. 2 of them have no published fix yet, so those are the ones to avoid or mitigate.

What is flask-caching's Vulert package health score?

Vulert scores flask-caching 60/100, which reads as usable, but worth attention. 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). The current release has a vulnerability with no published fix, which caps this score.

Is the latest version of flask-caching affected?

Yes. 2.5.1, the version you would install today, has 2 known vulnerabilities, and 2 has no published fix yet. Use an earlier unaffected release, or the workaround each vulnerability lists.

Which version of flask-caching should I use?

2.5.1 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 flask-caching have?

2 vulnerabilities are recorded for flask-caching in the PyPI 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 flask-caching vulnerabilities disclosed?

0 vulnerabilities were recorded for flask-caching in the last 12 months, and the oldest entry in this database dates to 13 May 2021. 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 flask-caching 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 flask-caching for upcoming vulnerabilities?

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