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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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:09850eca0a5584814eb4f5e738b327cd1cdb1f936f1546fc7d0ae95baabbfb9f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"linkify-it","vendor":"markdown-it","versions":[{"status":"affected","version":"< 5.0.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:66c4c45c933d11c498113335356ab50e39f3537bace2c10d16722473e9201afb · sha256:783242abae179646… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:66c4c45c933d11c498113335356ab50e39f3537bace2c10d16722473e9201afb · sha256:783242abae179646… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-407","description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:66c4c45c933d11c498113335356ab50e39f3537bace2c10d16722473e9201afb · sha256:783242abae179646… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/markdown-it/linkify-it/commit/105e5d77f7d119871d2b2d86ed208568eb3e7ffe","tags":["x_refsource_MISC"],"url":"https://github.com/markdown-it/linkify-it/commit/105e5d77f7d119871d2b2d86ed208568eb3e7ffe"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:66c4c45c933d11c498113335356ab50e39f3537bace2c10d16722473e9201afb · sha256:783242abae179646… · /containers/cna/references/1
{"name":"https://github.com/markdown-it/linkify-it/releases/tag/5.0.2","tags":["x_refsource_MISC"],"url":"https://github.com/markdown-it/linkify-it/releases/tag/5.0.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:66c4c45c933d11c498113335356ab50e39f3537bace2c10d16722473e9201afb · sha256:783242abae179646… · /containers/cna/references/2
{"name":"https://github.com/markdown-it/linkify-it/security/advisories/GHSA-v245-v573-v5vm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/markdown-it/linkify-it/security/advisories/GHSA-v245-v573-v5vm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:66c4c45c933d11c498113335356ab50e39f3537bace2c10d16722473e9201afb · sha256:783242abae179646… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/markdown-it/linkify-it/security/advisories/GHSA-v245-v573-v5vm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:66c4c45c933d11c498113335356ab50e39f3537bace2c10d16722473e9201afb · sha256:783242abae179646… · /containers/adp/0/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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