CVE-2026-50171
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
A Denial of Service (DoS) vulnerability exists in the @angular/common package of Angular. The formatNumber function, also used by DecimalPipe, PercentPipe, and CurrencyPipe, does not properly validate the upper bounds of the digitsInfo parameter, allowing a maliciously crafted string with excessively large fraction digit values to cause an unbounded loop in the roundNumber function, leading to system overload.
Risk Assessment
An attacker can remotely cause a server or client application to become unresponsive by sending a specially crafted request with an invalid digitsInfo parameter, resulting in service unavailability for legitimate users.
Recommendation
Immediately update Angular to version 22.0.0-rc.2, 21.2.15, 20.3.22, or 19.2.23, depending on the branch in use. The update fixes the vulnerability by adding validation for the digitsInfo parameter.
Original NVD description (English source)
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23, a Denial of Service (DoS) vulnerability exists in the @angular/common package of Angular. The formatNumber function, which is also utilized by DecimalPipe, PercentPipe, and CurrencyPipe, does not properly validate the upper bounds of the digitsInfo parameter. Specifically, the minimum and maximum fraction digits parsed from the digitsInfo string (e.g., 1.2-4) are converted to integers and used without limits. When parsing a maliciously crafted digitsInfo string with excessively large fraction digit values (e.g., 1.200000000-200000000), the internal roundNumber function attempts to pad the digits array to match the requested fraction size. This results in an unbounded loop that repeatedly pushes elements into an array. This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.