{"id":"CVE-2022-31103","summary":"Improper handling of CSS at-rules in lettersanitizer","details":"lettersanitizer is a DOM-based HTML email sanitizer for in-browser email rendering. All versions of lettersanitizer below 1.0.2 are affected by a denial of service issue when processing a CSS at-rule `@keyframes`. This package is depended on by [react-letter](https://github.com/mat-sz/react-letter), therefore everyone using react-letter is also at risk. The problem has been patched in version 1.0.2.","aliases":["GHSA-7r3r-gq8p-v9jj"],"modified":"2026-08-12T03:51:10.703992814Z","published":"2022-06-27T22:20:16Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/31xxx/CVE-2022-31103.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-754"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/31xxx/CVE-2022-31103.json"},{"type":"ADVISORY","url":"https://github.com/mat-sz/lettersanitizer/security/advisories/GHSA-7r3r-gq8p-v9jj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-31103"},{"type":"REPORT","url":"https://github.com/mat-sz/react-letter/issues/17"},{"type":"FIX","url":"https://github.com/mat-sz/lettersanitizer/commit/96d3dfe2ef0465d47324ed4d13e91ba0816a173f"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mat-sz/lettersanitizer","events":[{"introduced":"0"},{"fixed":"50f8a420606ba653cf87a45242ab12f51b03fe08"},{"fixed":"96d3dfe2ef0465d47324ed4d13e91ba0816a173f"}],"database_specific":{"cpe":"cpe:2.3:a:lettersanitizer_project:lettersanitizer:*:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.0.2"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v1.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-31103.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"}]}