{"api_version":"1","generated_at":"2026-07-23T11:24:18+00:00","cve":"CVE-2022-35923","urls":{"html":"https://cve.report/CVE-2022-35923","api":"https://cve.report/api/cve/CVE-2022-35923.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-35923","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-35923"},"summary":{"title":"CVE-2022-35923","description":"v8n is a javascript validation library. Versions of v8n prior to 1.5.1 were found to have an inefficient regular expression complexity in the `lowercase()` and `uppercase()` regex which could lead to a denial of service attack. In testing of the `lowercase()` function a payload of 'a' + 'a'.repeat(i) + 'A' with 32 leading characters took 29443 ms to execute. The same issue happens with uppercase(). Users are advised to upgrade. There are no known workarounds for this issue.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2022-08-02 20:15:00","updated_at":"2023-07-21 20:49:00"},"problem_types":["CWE-1333"],"metrics":[],"references":[{"url":"https://huntr.dev/bounties/2d92f644-593b-43b4-bfd1-c8042ac60609/","name":"https://huntr.dev/bounties/2d92f644-593b-43b4-bfd1-c8042ac60609/","refsource":"MISC","tags":[],"title":"Inefficient Regular Expression Complexity potentially leads to Denial of Service in  vulnerability found in v8n","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/imbrn/v8n/security/advisories/GHSA-xrx9-gj26-5wx9","name":"https://github.com/imbrn/v8n/security/advisories/GHSA-xrx9-gj26-5wx9","refsource":"CONFIRM","tags":[],"title":"Inefficient Regular Expression Complexity · Advisory · imbrn/v8n · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/imbrn/v8n/commit/92393862156fad190c05ec3f6e2bc73308dcd2f9","name":"https://github.com/imbrn/v8n/commit/92393862156fad190c05ec3f6e2bc73308dcd2f9","refsource":"MISC","tags":[],"title":"fix inefficient regular expressions on lowercase and uppercase rules · imbrn/v8n@9239386 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-35923","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-35923","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"35923","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"v8n_project","cpe5":"v8n","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"node.js","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2022-35923","STATE":"PUBLIC","TITLE":"Inefficient Regular Expression Complexity in v8n"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"v8n","version":{"version_data":[{"version_value":"< 1.5.1"}]}}]},"vendor_name":"imbrn"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"v8n is a javascript validation library. 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There are no known workarounds for this issue."}]},"impact":{"cvss":{"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"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-400: Uncontrolled Resource Consumption"}]}]},"references":{"reference_data":[{"name":"https://github.com/imbrn/v8n/security/advisories/GHSA-xrx9-gj26-5wx9","refsource":"CONFIRM","url":"https://github.com/imbrn/v8n/security/advisories/GHSA-xrx9-gj26-5wx9"},{"name":"https://github.com/imbrn/v8n/commit/92393862156fad190c05ec3f6e2bc73308dcd2f9","refsource":"MISC","url":"https://github.com/imbrn/v8n/commit/92393862156fad190c05ec3f6e2bc73308dcd2f9"},{"name":"https://huntr.dev/bounties/2d92f644-593b-43b4-bfd1-c8042ac60609/","refsource":"MISC","url":"https://huntr.dev/bounties/2d92f644-593b-43b4-bfd1-c8042ac60609/"}]},"source":{"advisory":"GHSA-xrx9-gj26-5wx9","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2022-08-02 20:15:00","lastModifiedDate":"2023-07-21 20:49:00","problem_types":["CWE-1333"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:v8n_project:v8n:*:*:*:*:*:node.js:*:*","versionEndExcluding":"1.5.1","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}