CVE-2021-21304
Prototype Pollution in Dynamoose
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 since the vulnerable method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions. Version 2.7.0 includes a patch for this vulnerability.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Prototype Pollution in Dynamoose
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 since the vulnerable method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions. Version 2.7.0 includes a patch for this vulnerability.
- Record
CVE-2021-21304- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-915, CWE-1321
- Updated
- 2026-11-02
EUVDEUVD-2021-0571
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 since the vulnerable method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions. Version 2.7.0 includes a patch for this vulnerability.
- Record
EUVD-2021-0571- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rrqm-p222-8ph2
Prototype Pollution in Dynamoose
Impact
In Dynamoose versions 2.0.0-2.6.0 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.
We do not believe this issue impacts v1.x.x since this method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions.
Patches
v2.7.0 includes a patch for this vulnerability.
Workarounds
We are unaware of any workarounds to patch this vulnerability other than upgrading to v2.7.0 or greater.
References
- Patch commit hash: 324c62b4709204955931a187362f8999805b1d8e
For more information
If you have any questions or comments about this advisory:
Credit
- GitHub CodeQL Code Scanning
- Record
GHSA-rrqm-p222-8ph2- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-915, CWE-1321
- Updated
- 2026-11-02
NVD
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 since the vulnerable method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions. Version 2.7.0 includes a patch for this vulnerability.
- Record
CVE-2021-21304- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-915, CWE-1321
- Updated
- 2026-11-02
OSV
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 since the vulnerable method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions. Version 2.7.0 includes a patch for this vulnerability.
- Record
CVE-2021-21304- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-rrqm-p222-8ph2
Prototype Pollution in Dynamoose
Impact
In Dynamoose versions 2.0.0-2.6.0 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.
We do not believe this issue impacts v1.x.x since this method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions.
Patches
v2.7.0 includes a patch for this vulnerability.
Workarounds
We are unaware of any workarounds to patch this vulnerability other than upgrading to v2.7.0 or greater.
References
- Patch commit hash: 324c62b4709204955931a187362f8999805b1d8e
For more information
If you have any questions or comments about this advisory:
Credit
- GitHub CodeQL Code Scanning
- Record
GHSA-rrqm-p222-8ph2- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - Weakness
- CWE-1321, CWE-915
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
dynamoosenpm | 2.0.0 up to 2.7.0 | 2.7.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21304 is a high vulnerability (CVSS 7.2) in Dynamoose, published February 8, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.92%, the 80th percentile. Fixed in dynamoose 2.7.0.
References
github.com/dynamoose/dynamoose/security/advisories/GHSA-rrqm-p222-8ph2
npmjs.com/package/dynamoose
nvd.nist.gov/vuln/detail/CVE-2021-21304