{"id":"GHSA-48r7-hpm6-gfxm","summary":"@angular/common: 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.*","aliases":["CVE-2026-54268"],"modified":"2026-07-17T21:06:24.004449739Z","published":"2026-06-15T17:24:52Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-06-15T17:24:52Z","nvd_published_at":"2026-06-22T16:16:39Z","cwe_ids":["CWE-1333","CWE-400"]},"references":[{"type":"WEB","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":"WEB","url":"https://github.com/angular/angular/pull/69197"},{"type":"WEB","url":"https://github.com/angular/angular/commit/eeb03f4ea310e2e51ba5d53a421ec7b418e186cd"},{"type":"PACKAGE","url":"https://github.com/angular/angular"}],"affected":[{"package":{"name":"@angular/common","ecosystem":"npm","purl":"pkg:npm/%40angular/common"},"ranges":[{"type":"SEMVER","events":[{"introduced":"22.0.0-next.0"},{"fixed":"22.0.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-48r7-hpm6-gfxm/GHSA-48r7-hpm6-gfxm.json"}},{"package":{"name":"@angular/common","ecosystem":"npm","purl":"pkg:npm/%40angular/common"},"ranges":[{"type":"SEMVER","events":[{"introduced":"21.0.0-next.0"},{"fixed":"21.2.17"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-48r7-hpm6-gfxm/GHSA-48r7-hpm6-gfxm.json"}},{"package":{"name":"@angular/common","ecosystem":"npm","purl":"pkg:npm/%40angular/common"},"ranges":[{"type":"SEMVER","events":[{"introduced":"20.0.0-next.0"},{"fixed":"20.3.25"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-48r7-hpm6-gfxm/GHSA-48r7-hpm6-gfxm.json"}},{"package":{"name":"@angular/common","ecosystem":"npm","purl":"pkg:npm/%40angular/common"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"19.2.25"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-48r7-hpm6-gfxm/GHSA-48r7-hpm6-gfxm.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}