CVE-2026-54268: Angular: Denial of Service (DoS) via OOM in Date Formatting (formatDate)

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-22 · updated 2026-07-09
Weakness: CWE-400

Description

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.1, 21.2.17, and 20.3.25, a Denial of Service (DoS) vulnerability exists in the @angular/common package of the Angular framework. The formatDate function, which is also utilized by the standard Angular DatePipe, does not properly limit or validate the length of the format parameter. When parsing a maliciously crafted, excessively long date format string (e.g., a repeating pattern or very large string), the internal parser splits the string iteratively using a regular expression loop. This results in uncontrolled resource consumption (high CPU utilization and excessive memory allocations), leading to a Denial of Service (DoS). This vulnerability is fixed in 22.0.1, 21.2.17, and 20.3.25.

Affected products

angular: through 19.2.25; from 20.0.0 before 20.3.25; from 21.0.0 before 21.2.17; from 22.0.0 before 22.0.1 — fixed in 20.3.25, 21.2.17, 22.0.1

How to fix

Upgrade to a fixed version: angular 20.3.25, 21.2.17, 22.0.1. Check the vendor advisory for mitigations.

References

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