VulnerabilityAnalyzed
CVE-2026-59887
linkify-it is a links recognition library with full Unicode support.
HIGH 7.5EPSS 0.43%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.43% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-407
- Affected
- markdown-it/linkify-it
- Source
- security-advisories@github.com
References
- https://github.com/markdown-it/linkify-it/commit/105e5d77f7d119871d2b2d86ed208568eb3e7ffePatch
- https://github.com/markdown-it/linkify-it/releases/tag/5.0.2Release Notes
- https://github.com/markdown-it/linkify-it/security/advisories/GHSA-v245-v573-v5vmExploit, Mitigation, Vendor Advisory
- https://github.com/markdown-it/linkify-it/security/advisories/GHSA-v245-v573-v5vmExploit, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.