{"id":"CVE-2026-54268","aliases":["GHSA-48r7-hpm6-gfxm"],"url":"https://o3.security/vulnerability/CVE-2026-54268","summary":"Angular: Denial of Service (DoS) via OOM in Date Formatting (formatDate)","details":"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. \n\nWhen 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).\n\n\n### Impact\n\n#### 1. Server-Side Rendering (SSR)\nIn Angular applications that leverage Server-Side Rendering, an attacker can supply a malicious payload with an excessively long date format string. Processing this on the server causes high CPU usage and triggers a `JavaScript heap out of memory` crash, rendering the application unavailable to all users.\n\n#### 2. Client-Side Rendering (CSR)\nIn standard client-side applications, executing the vulnerable function with an excessively long format string blocks the browser's main thread, causing the browser tab to freeze and become completely unresponsive.\n\n### Patched Versions\n* 22.0.1  \n* 21.2.17  \n* 20.3.25\n\n### Attack Preconditions\nFor this vulnerability to be exploitable, both of the following conditions must be met:\n1. **Vulnerable Component Usage:** The application must format dates using the `formatDate` utility or the `DatePipe`.\n2. **Attacker-Controlled Parameter:** The date format string passed to these utilities must be customizable or directly controlled by untrusted user input (e.g., parsed from query parameters, user preferences, or API responses).\n\n*If the date format is hardcoded (e.g., `'mediumDate'`, `'shortTime'`, or static strings) or properly validated to be within a reasonable length limit, the application is not vulnerable.*","published":"2026-06-22T15:31:47.836Z","modified":"2026-08-12T03:51:22.585561112Z","cvss":null,"epss":{"score":0.00583,"percentile":0.45598,"asOf":"2026-09-02"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@angular/common","fixedVersion":"22.0.1"},{"ecosystem":"npm","name":"@angular/common","fixedVersion":"21.2.17"},{"ecosystem":"npm","name":"@angular/common","fixedVersion":"20.3.25"},{"ecosystem":"npm","name":"@angular/common","fixedVersion":null}],"fix":{"url":"https://github.com/angular/angular/commit/eeb03f4ea310e2e51ba5d53a421ec7b418e186cd","label":"angular/angular@eeb03f4"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54268.json"},{"type":"ADVISORY","url":"https://github.com/angular/angular/security/advisories/GHSA-48r7-hpm6-gfxm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54268"},{"type":"FIX","url":"https://github.com/angular/angular/commit/eeb03f4ea310e2e51ba5d53a421ec7b418e186cd"},{"type":"FIX","url":"https://github.com/angular/angular/pull/69197"},{"type":"PACKAGE","url":"https://github.com/angular/angular"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:22.585561112Z"}}