{"id":"CVE-2026-100350","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-100350","generatedAt":"2026-10-28T03:38:57.545Z","title":"An unauthenticated remote client can send an affected endpoint a request containing many unrelated query keys, causing ValidateRequest to perform work and allocations proportional to the attacker-controlled key count for every deepObject parameter.","description":"kin-openapi is a Go project for handling OpenAPI files. From 0.145.0 until 0.146.0, openapi3filter repeatedly calls regexp.MustCompile for the same parameter-name regular expression inside the per-query-key loop in urlValuesDecoder.DecodeObject used to decode a deepObject query parameter. An unauthenticated remote client can send an affected endpoint a request containing many unrelated query keys, causing ValidateRequest to perform work and allocations proportional to the attacker-controlled key count for every deepObject parameter. The expression itself is fixed and this is not regular expression denial of service; the resource consumption comes from loop-invariant recompilation. This issue is fixed in version 0.146.0.","published":"2026-10-15T16:17:31.000Z","lastModified":"2026-10-15T19:17:13.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"cwe":["CWE-400","CWE-770","CWE-1050"],"affected":[],"epss":{"score":0.00451,"percentile":0.39021,"date":"2026-10-27","history":[{"date":"2026-10-16","score":0.00451,"percentile":0.37748}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.45%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-15T16:17:31.000Z","detail":{"score":"5.3","severity":"MEDIUM","publishedAt":"2026-10-15T16:17:30.793Z"},"summary":"New CVE, medium severity (CVSS 5.3)."}],"references":[{"url":"https://github.com/getkin/kin-openapi/commit/d090e36b2f1c42c898ba2a687a8f6e25f5ca727f","source":"security-advisories@github.com"},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.146.0","source":"security-advisories@github.com"},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-h4r5-mxv5-8mjc","source":"security-advisories@github.com"},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-h4r5-mxv5-8mjc","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100350","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}