CVE-2026-68921: DiceBear SVG Injection Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gcr2-9v8m-gq45",
  "modified" : "2026-09-02T22:44:26Z",
  "published" : "2026-09-02T22:44:25Z",
  "aliases" : [ "CVE-2026-68921" ],
  "summary" : "DiceBear: SVG injection via the unescaped rotate option in @dicebear/core (and fontSize/fontWeight in @dicebear/initials)",
  "details" : "## Summary\n\n`@dicebear/core` builds avatar SVGs from caller-supplied options. The numeric `rotate` option is interpolated into an SVG `transform` attribute without XML-escaping. It is typed as a number, but nothing checks the type at runtime, so a string value passes straight through and can break out of the attribute to inject arbitrary SVG markup.\n\nThis is the same root cause as CVE-2026-33311 (GHSA-mr9r-mww3-v6gv), which escaped the string options `backgroundColor`, `fontFamily`, and `textColor` but did not cover `rotate`. `@dicebear/initials` has the same gap in its numeric `fontSize` and `fontWeight` options.\n\n## Impact\n\nCross-site scripting (CWE-79). When the generated avatar is rendered inline (for example via `innerHTML`) or served as `image/svg+xml` and opened directly, injected markup such as an `<image onerror>` handler runs script in the page's origin.\n\nExploitation requires the application to pass untrusted input into one of these options:\n\n- `rotate` (`@dicebear/core`)\n- `fontSize`, `fontWeight` (`@dicebear/initials`)\n\nIn most integrations these options are set by the developer and only `seed` is user-controlled, so the vulnerable configuration is uncommon. Applications that use trusted, hardcoded values for these options are not at risk.\n\n## Patches\n\nFixed in `@dicebear/core` 9.4.3 and `@dicebear/initials` 9.4.3: the values are now XML-escaped before being written into the SVG, matching the CVE-2026-33311 fix. Upgrade to 9.4.3 or later.\n\nThe 5.x through 8.x lines share the same flaw but are end-of-life and will not receive a backport; upgrade to 9.4.3. The 10.x line is not affected.\n\n## Workarounds\n\nIf you cannot upgrade, coerce the affected options to a number before passing them to `createAvatar`:\n\n```js\nrotate: Number(userInput) || 0,\n```\n\n## Credits\n\nReported by @rz1027.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@dicebear/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "9.4.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 9.4.2"
    }
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@dicebear/initials"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "9.4.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 9.4.2"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/dicebear/dicebear/security/advisories/GHSA-gcr2-9v8m-gq45"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68921"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dicebear/dicebear/commit/922946d738c4e77ab6c412e27ede75941fec4b59"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/dicebear/dicebear"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/dicebear/dicebear/releases/tag/v9.4.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-184", "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-02T22:44:25Z",
    "nvd_published_at" : "2026-08-20T21:17:07Z"
  }
}