CVE-2021-21304: Dynamoose is an open-source modeling tool for Amazon's DynamoDB

Q: How do I fix CVE-2021-21304?

dynamoose: upgrade to 2.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-21304 being exploited?

CVE-2021-21304 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-21304 affect?

CVE-2021-21304 affects dynamoose. Severity is high (CVSS 7.2). Dynamoose is an open-source modeling tool for Amazon's DynamoDB. In Dynamoose from version 2.0.0 and before version 2.7.0 there was a prototype pollution vulnerability in the internal utility method "lib/utils/object/set.ts". This method is

Q: How urgent is CVE-2021-21304?

Priority 55/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.2REMOTEWATCHLISTUPGRADE

CVE-2021-21304 is a high-severity flaw (CVSS 7.2) affecting dynamoose. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dynamoose is an open-source modeling tool for Amazon's DynamoDB. In Dynamoose from version 2.0.0 and before version 2.7.0 there was a prototype pollution vulnerability in the internal utility method "lib/utils/object/set.ts". This method is used throughout the codebase for various operations throughout Dynamoose. We have not seen any evidence of this vulnerability being exploited. There is no evidence this vulnerability impacts versions 1.x.x sin

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-915, CWE-1321
Published	2021-02-08
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: dynamoosejs

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

Am I affected?

Timeline

2021-02-08 18:15 UTCPublished CVE record published
2026-06-17 03:35 UTCUpdated Record last modified

dynamoosejs dynamoose UPGRADE

Affected: >= 2.0.0 and < 2.7.0

Fixed in: 2.7.0

Safe to downgrade to: a release before 2.0.0

1. Check installed version

npm ls dynamoose

2. UPGRADE to 2.7.0

npm install dynamoose@">=2.7.0"

3. If no update is available yet, DOWNGRADE to a release before 2.0.0

npm view dynamoose versions npm install dynamoose@"<2.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-21304?

dynamoose: upgrade to 2.7.0. Exact commands for each OS are on this page.

Is CVE-2021-21304 being exploited?

CVE-2021-21304 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-2021-21304 affect?

CVE-2021-21304 affects dynamoose. Severity is high (CVSS 7.2). Dynamoose is an open-source modeling tool for Amazon's DynamoDB. In Dynamoose from version 2.0.0 and before version 2.7.0 there was a prototype pollution vulnerability in the internal utility method "lib/utils/object/set.ts". This method is

How urgent is CVE-2021-21304?

Priority 55/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

References

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