Angular: Denial of Service (DoS) via OOM in Number Formatting (digitsInfo)

Summary

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.

Timeline

1. Jun 22, 2026, 3:49 PM UTCCVE published
2. Jun 23, 2026, 2:16 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Jun 23, 2026, 4:02 PM UTCRecord last updated

Affected versions

• angular angular

  From 22.0.0-next.0 · fixed in 22.0.0-rc.2; From 21.0.0-next.0 · fixed in 21.2.15; From 20.0.0-next.0 · fixed in 20.3.22; From 19.0.0-next.0 · fixed in 19.2.23; through 18.2.14

• @angular/commonnpm

  From 22.0.0-next.0 · fixed in 22.0.0-rc.2

• @angular/commonnpm

  From 20.0.0-next.0 · fixed in 20.3.22

• @angular/commonnpm

  From 19.0.0-next.0 · fixed in 19.2.23

• @angular/commonnpm

  through 18.2.14

• @angular/commonnpm

  From 21.0.0-next.0 · fixed in 21.2.15

References 1