Bug 2491477 (CVE-2026-50171)

Summary: CVE-2026-50171 @angular/common: Angular @angular/common: Denial of Service via malformed digitsInfo parameter
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: amctagga, aoconnor, bniver, ewittman, flucifre, gmalinko, gmeno, gotiwari, gparvin, groman, janstey, jhorak, mbenjamin, mhackett, mvyas, nipatil, pahickey, pantinor, pdelbell, rhaigner, rhel-process-autobot, rkubis, rstepani, sostapov, vereddy, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the @angular/common package of Angular. The formatNumber function, which is also used by DecimalPipe, PercentPipe, and CurrencyPipe, does not properly validate the upper bounds of the digitsInfo parameter. A remote attacker could exploit this by providing a maliciously crafted digitsInfo string with excessively large fraction digit values. This leads to an unbounded loop, causing a Denial of Service (DoS) in the affected application.
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Description OSIDB Bzimport 2026-06-22 18:03:43 UTC 
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.