CVE-2026-59887
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 src_email_name in lib/re.mjs, causing O(n^2) CPU consumption on crafted user text. This issue is fixed in version 5.0.2.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-25)
- CWE
- CWE-407
- Published
- Modified
- Record from
- the NVD, synced
Affected
- markdown-it:linkify-it
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-v245-v573-v5vm | npm | linkify-it | <5.0.2 | 5.0.2 |
References
- https://github.com/markdown-it/linkify-it/commit/105e5d77f7d119871d2b2d86ed208568eb3e7ffe
- https://github.com/markdown-it/linkify-it/releases/tag/5.0.2
- https://github.com/markdown-it/linkify-it/security/advisories/GHSA-v245-v573-v5vm
- https://github.com/markdown-it/linkify-it/security/advisories/GHSA-v245-v573-v5vm