GHSA-V245-V573-V5VM linkify-it: Quadratic-complexity DoS via the `mailto:` validator scan-loop on attacker text

Summary linkify-it's schema-scan loop .test / .match, the documented public API invokes the mailto: schema validator at every mailto: occurrence in the input text. For each occurrence the validator does text.slicepos an On copy and runs an email regex whose local-part class srcemailname greedily...

Inefficient Algorithmic Complexity

Overview linkify-it is a Links recognition library with FULL unicode support Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity in the mailto: validator scan-loop on attacker-supplied text. An attacker can cause excessive CPU consumption by submitting specially...

Inefficient Algorithmic Complexity

Overview org.webjars.npm:linkify-it is a Links recognition library with FULL unicode support Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity in the mailto: validator scan-loop on attacker-supplied text. An attacker can cause excessive CPU consumption by...

CVE-2026-59887 linkify-it: Quadratic-complexity DoS via the `mailto:` validator scan-loop on attacker text

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.2, the mailto: schema validator used by .test and .match can be invoked at every mailto: occurrence and scan the remaining input through srcemailname in lib/re.mjs, causing On^2 CPU consumption on crafted user text...

CVE-2026-59887 linkify-it: Quadratic-complexity DoS via the `mailto:` validator scan-loop on attacker text

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.2, the mailto: schema validator used by .test and .match can be invoked at every mailto: occurrence and scan the remaining input through srcemailname in lib/re.mjs, causing On^2 CPU consumption on crafted user text...

CVE-2026-59887

The CVE concerns the linkify-it library. The mailto: schema validator (used by .test()/.match()) could, before version 5.0.2, be invoked for each mailto occurrence and scan the remaining input through src_email_name in lib/re.mjs, causing O(n^2) CPU consumption (DoS) on crafted text. Impact is hi...