{"id":"CVE-2026-67214","sourceIdentifier":"disclosure@vulncheck.com","published":"2026-07-29T14:16:35.043","lastModified":"2026-10-23T23:10:00.157","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"nanoid (Nano ID) before 3.3.16 and 5.1.16 contains an infinite loop in the customAlphabet and nanoid functions of its non-secure module (nanoid/non-secure). When these functions are given a negative size, the loop counter is decremented from a negative value and never reaches its termination condition, spinning indefinitely and hanging the calling thread. An application that passes an unvalidated, attacker-controlled negative size to these functions is exposed to a denial-of-service condition."},{"lang":"es","value":"nanoid (Nano ID) anterior a la versión 5.1.16 contiene un bucle infinito en las funciones customAlphabet y nanoid de su módulo no seguro (nanoid/non-secure). Cuando a estas funciones se les proporciona un tamaño negativo, el contador del bucle se decrementa desde un valor negativo y nunca alcanza su condición de terminación, girando indefinidamente y colgando el hilo de llamada. Una aplicación que pasa un tamaño negativo no validado y controlado por el atacante a estas funciones está expuesta a una condición de denegación de servicio."}],"affected":[{"source":"disclosure@vulncheck.com","affectedData":[{"vendor":"nanoid_project","product":"nanoid","defaultStatus":"unaffected","packageURL":"pkg:npm/nanoid","versions":[{"version":"0","lessThan":"5.1.16","versionType":"semver","status":"affected"},{"version":"5.1.16","versionType":"semver","status":"unaffected"},{"version":"0","lessThan":"3.3.16","versionType":"semver","status":"affected"},{"version":"3.3.16","versionType":"semver","status":"unaffected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"disclosure@vulncheck.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"disclosure@vulncheck.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-29T14:37:09.751333Z","id":"CVE-2026-67214","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"disclosure@vulncheck.com","type":"Secondary","description":[{"lang":"en","value":"CWE-835"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nanoid_project:nanoid:*:*:*:*:*:node.js:*:*","versionEndExcluding":"3.3.16","matchCriteriaId":"426854C1-BE66-4788-82CE-5EE139435C03"},{"vulnerable":true,"criteria":"cpe:2.3:a:nanoid_project:nanoid:*:*:*:*:*:node.js:*:*","versionStartIncluding":"4.0.0","versionEndExcluding":"5.1.16","matchCriteriaId":"8E3AF0E1-088B-4C46-B20E-2FCFB9696B28"}]}]}],"references":[{"url":"https://github.com/ai/nanoid/commit/6ccc67bbaba71d3d77a21d9b636f4171a268ce49","source":"disclosure@vulncheck.com","tags":["Patch"]},{"url":"https://github.com/ai/nanoid/releases/tag/3.3.16","source":"disclosure@vulncheck.com","tags":["Product","Release Notes"]},{"url":"https://github.com/ai/nanoid/releases/tag/5.1.16","source":"disclosure@vulncheck.com","tags":["Product","Release Notes"]},{"url":"https://www.vulncheck.com/advisories/nanoid-before-infinite-loop-via-negative-size-in-non-secure-module","source":"disclosure@vulncheck.com","tags":["Patch","Release Notes","Third Party Advisory"]}]}