{"id":"CVE-2026-62864","aliases":[],"cve":{"records":[{"id":"CVE-2026-62864","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-07-14T21:10:50.032Z","published":"2026-10-30T20:34:42.963Z","modified":"2026-10-30T20:34:42.963Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-30T20:34:42.963Z"}],"references":[{"url":"https://github.com/ring-clojure/ring/security/advisories/GHSA-q2j3-fc6x-78jj","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/ring-clojure/ring/commit/18738cbb8ab7504da4a5c72c9eb5fdcbf142646e","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/ring-clojure/ring/tree/1.15.5","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","source":"GitHub_M"}],"applicability":[],"prioritization":[]},"title":"Ring's nested-params middleware has inefficient regular expression complexity","titleSource":"GitHub_M","descriptionSource":"GitHub_M","description":"Ring is a Clojure web applications library inspired by Python's WSGI and Ruby's Rack. Prior to 1.15.5, `wrap-nested-params` in the `ring.middleware.nested-params` namespace uses a backtracking regular expression to match parameter names from URL query strings and HTTP request bodies. An attacker can craft a parameter name that drives quadratic O(n^2) matching work, causing regular-expression denial of service in applications using the middleware. `Ring-Defaults` users are also exposed because nested-params is enabled by default. Applications omitting the middleware do not expose this parsing path. This issue is fixed in version 1.15.5.","score":7.5,"severity":"high","published":"2026-10-30T20:34:42.963Z","modified":"2026-10-30T20:34:42.963Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"ring-clojure","name":"ring","platforms":[],"versions":[{"version":"< 1.15.5","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-62864"}],"remediation":[],"references":["https://github.com/ring-clojure/ring/security/advisories/GHSA-q2j3-fc6x-78jj","https://github.com/ring-clojure/ring/commit/18738cbb8ab7504da4a5c72c9eb5fdcbf142646e","https://github.com/ring-clojure/ring/tree/1.15.5"],"sources":[{"name":"CVE","id":"CVE-2026-62864","modified":"2026-10-30T20:34:42.963Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-62864"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5}],"sourceAffected":[],"observedAt":"2026-10-30T21:23:06.376Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T11:20:32.820Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T21:30:33.326Z","attemptedAt":"2026-10-30T21:30:33.326Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T21:30:32.853Z","attemptedAt":"2026-10-30T21:30:32.853Z"},{"source":"EUVD","status":"refresh-failed","attemptedAt":"2026-10-30T21:30:33.325Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T21:30:33.326Z","attemptedAt":"2026-10-30T21:30:33.326Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-62864","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62864","modified":"2026-10-30T21:17:14.693","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-30T21:30:33.326Z"}],"aiSummary":{"text":"Ring library versions prior to 1.15.5 have inefficient regular expression complexity in the `wrap-nested-params` middleware, allowing an attacker to cause a denial of service. The issue is fixed in version 1.15.5. Applications not using the middleware are not exposed.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T05:01:08.001Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-62864"}]}}