CVE-2026-54268: @angular/common Denial of Service Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-48r7-hpm6-gfxm",
  "modified" : "2026-07-15T22:04:14Z",
  "published" : "2026-06-15T17:24:52Z",
  "aliases" : [ "CVE-2026-54268" ],
  "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.*",
  "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/common"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "22.0.0-next.0"
      }, {
        "fixed" : "22.0.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/common"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "21.0.0-next.0"
      }, {
        "fixed" : "21.2.17"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/common"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "20.0.0-next.0"
      }, {
        "fixed" : "20.3.25"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/common"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "19.2.25"
      } ]
    } ]
  } ],
  "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333", "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-15T17:24:52Z",
    "nvd_published_at" : "2026-06-22T16:16:39Z"
  }
}