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CVE-2021-23447: This affects the package teddy before 0.5.9

40
This month
MEDIUM 5.4UPGRADE

CVE-2021-23447 is a medium-severity flaw (CVSS 5.4) affecting teddy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects the package teddy before 0.5.9. A type confusion vulnerability can be used to bypass input sanitization when the model content is an array (instead of a string).

Why this priority

  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score5.4 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance1.1% (top 34%)
CISA exploited listNo
WeaknessCWE-843
Published2021-10-07
Last modified2026-06-17
Publisher (CNA): Snyk · Vendor: teddy project

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

teddy project teddy UPGRADE
Affected: < 0.5.9
Fixed in: 0.5.9
Safe to downgrade to: no unaffected older release
1. Check installed version
npm ls teddy
2. UPGRADE to 0.5.9
npm install teddy@">=0.5.9"
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-23447?

teddy: upgrade to 0.5.9. Exact commands for each OS are on this page.

Is CVE-2021-23447 being exploited?

CVE-2021-23447 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-23447 affect?

CVE-2021-23447 affects teddy. Severity is medium (CVSS 5.4). This affects the package teddy before 0.5.9. A type confusion vulnerability can be used to bypass input sanitization when the model content is an array (instead of a string).

How urgent is CVE-2021-23447?

Priority 40/100. Public exploit reference

References

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