CVE Explorer
CVE-2026-48801
linkify-it is a links recognition library with full Unicode support. Prior to 5.0.1, LinkifyIt.prototype.match, the package's primary public API, has O(N²) algorithmic complexity for inputs containing many fuzzy links or emails because the JavaScript-level scan loop re-slices input and re-runs unanchored regex searches on progressively shorter tails. Any service that synchronously renders untrusted Markdown with linkify:true on a request hot path can inherit a worker-process denial of service tr
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":"< 5.0.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:e1d537839e3f7f375abb310191f39c33f7cc334b4cdb13ab181ef25c35952c6a · sha256:d4f2636712adc74d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:e1d537839e3f7f375abb310191f39c33f7cc334b4cdb13ab181ef25c35952c6a · sha256:d4f2636712adc74d… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:e1d537839e3f7f375abb310191f39c33f7cc334b4cdb13ab181ef25c35952c6a · sha256:d4f2636712adc74d… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/markdown-it/linkify-it/commit/6be6d15e0641bf1daeaa977d500cabc743166159","tags":["x_refsource_MISC"],"url":"https://github.com/markdown-it/linkify-it/commit/6be6d15e0641bf1daeaa977d500cabc743166159"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e1d537839e3f7f375abb310191f39c33f7cc334b4cdb13ab181ef25c35952c6a · sha256:d4f2636712adc74d… · /containers/cna/references/1
{"name":"https://github.com/markdown-it/linkify-it/security/advisories/GHSA-22p9-wv53-3rq4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/markdown-it/linkify-it/security/advisories/GHSA-22p9-wv53-3rq4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e1d537839e3f7f375abb310191f39c33f7cc334b4cdb13ab181ef25c35952c6a · sha256:d4f2636712adc74d… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/markdown-it/linkify-it/security/advisories/GHSA-22p9-wv53-3rq4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e1d537839e3f7f375abb310191f39c33f7cc334b4cdb13ab181ef25c35952c6a · sha256:d4f2636712adc74d… · /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.