This affects the package html-parse-stringify before 2.0.1; all versions of package html-parse-stringify2. Sending certain input could cause one of the regular expressions that is used for parsing to backtrack, freezing the process.
github.com/HenrikJoreteg/html-parse-stringify/blob/master/lib/parse.js%23L2
github.com/HenrikJoreteg/html-parse-stringify/commit/c7274a48e59c92b2b7e906fedf9065159e73fe12
github.com/HenrikJoreteg/html-parse-stringify/releases/tag/v2.0.1
github.com/rayd/html-parse-stringify2/blob/master/lib/parse.js%23L2
nvd.nist.gov/vuln/detail/CVE-2021-23346
snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1080633
snyk.io/vuln/SNYK-JS-HTMLPARSESTRINGIFY-1079306
snyk.io/vuln/SNYK-JS-HTMLPARSESTRINGIFY2-1079307