{"id":"CVE-2026-100350","title":"kin-openapi is a Go project for handling OpenAPI files","summary":"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.Decod…","severity":"medium","cvss":5.3,"cvssVector":"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"],"vendor":"getkin","product":"kin-openapi","affected":["kin-openapi >= 0.145.0, < 0.146.0"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T19:17:12.833","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100350","references":[{"url":"https://github.com/getkin/kin-openapi/commit/d090e36b2f1c42c898ba2a687a8f6e25f5ca727f","label":"security-advisories@github.com"},{"url":"https://github.com/getkin/kin-openapi/releases/tag/v0.146.0","label":"security-advisories@github.com"},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-h4r5-mxv5-8mjc","label":"security-advisories@github.com"},{"url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-h4r5-mxv5-8mjc","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100350"},{"url":"https://github.com/advisories/GHSA-h4r5-mxv5-8mjc"},{"url":"https://github.com/getkin/kin-openapi"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100350.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-100350"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2553584"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100350"}],"tags":["nvd","cve.org","exploit-available","ghsa","go","osv","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-15T18:32:09.281614Z"},"ingestedAt":"2026-10-15T16:13:11.072Z","aliases":["GHSA-h4r5-mxv5-8mjc"],"ecosystem":"go","patched":["github.com/getkin/kin-openapi 0.146.0"],"epss":0.00451,"epssPercentile":0.39021,"slug":"CVE-2026-100350","body":"## Overview\n\nkin-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-100350)\n\nAffected packages:\n\n- `github.com/getkin/kin-openapi >= 0.145.0, < 0.146.0`\n\nPatched in:\n\n- `github.com/getkin/kin-openapi 0.146.0`\n\nSource: https://github.com/advisories/GHSA-h4r5-mxv5-8mjc\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100350.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":222676,"id":"CVE-2026-100350","ts":1792092514676,"field":"exploit_available","old":"false","new":"true"}]}