CVE-2021-23624: Prototype Pollution

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-11-03 · updated 2026-06-17
Weakness: CWE-843

Description

This affects the package dotty before 0.1.2. A type confusion vulnerability can lead to a bypass of CVE-2021-25912 when the user-provided keys used in the path parameter are arrays.

Affected products

dotty: before 0.1.2 — fixed in 0.1.2

How to fix

Upgrade to a fixed version: dotty 0.1.2. Check the vendor advisory for mitigations.

References

https://github.com/deoxxa/dotty/commit/88f61860dcc274a07a263c32cbe9d44c24ef02d7
https://snyk.io/vuln/SNYK-JS-DOTTY-1577292
https://github.com/deoxxa/dotty/commit/88f61860dcc274a07a263c32cbe9d44c24ef02d7
https://snyk.io/vuln/SNYK-JS-DOTTY-1577292

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