{"id":"CVE-2026-76905","summary":"kin-openapi openai3filter: nil-pointer panic in ConvertErrors on malformed multipart/form-data body enables unauthenticated DoS","details":"kin-openapi is a Go project for handling OpenAPI files. From 0.10.0 until 0.141.0, openapi3filter.convertParseError in openapi3filter/validation_error_encoder.go dereferences e.Parameter.In without checking whether e.Parameter is nil. A malformed non-string scalar field in a multipart/form-data request body produces a nested ParseError with a nil RequestError.Parameter, and applications that render the validation error through openapi3filter.ConvertErrors or ValidationErrorEncoder panic. An unauthenticated client can repeatedly send such requests to deny service when the application lacks a recovery boundary. JSON request bodies and applications that do not use these error-rendering helpers are not affected. This issue is fixed in version 0.141.0.","aliases":["GHSA-mmfr-pmjx-hw9w"],"modified":"2026-08-23T03:53:41.982675038Z","published":"2026-08-21T20:43:07.066Z","related":["CGA-f33f-cg33-4vp5"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76905.json"},"references":[{"type":"WEB","url":"https://github.com/getkin/kin-openapi/releases/tag/v0.141.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76905.json"},{"type":"ADVISORY","url":"https://github.com/getkin/kin-openapi/security/advisories/GHSA-mmfr-pmjx-hw9w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76905"},{"type":"FIX","url":"https://github.com/getkin/kin-openapi/commit/1d0a337c9b1570fab283be8a04c8af6e43b9a22c"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/getkin/kin-openapi","events":[{"introduced":"2421d443a11015c4cf64688e918c684dfc3ff0df"},{"fixed":"1d0a337c9b1570fab283be8a04c8af6e43b9a22c"}],"database_specific":{"extracted_events":[{"introduced":"0.10.0"},{"fixed":"0.141.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v0.140.0","v0.139.0","v0.138.0","v0.137.0","v0.136.0","v0.135.0","v0.134.0","v0.133.0","v0.132.0","v0.131.0","v0.130.0","v0.129.0","v0.128.0","v0.127.0","v0.126.0","v0.125.0","v0.124.0","v0.123.0","v0.122.0","v0.121.0","v0.120.0","v0.119.0","v0.118.0","v0.117.0","v0.116.0","v0.115.0","v0.114.0","v0.113.0","v0.112.0","v0.111.0","v0.110.0","v0.109.0","v0.108.0","v0.107.0","v0.106.0","v0.105.0","v0.104.0","v0.103.0","v0.102.0","v0.101.0","v0.100.0","v0.99.0","v0.98.0","v0.97.0","v0.96.0","v0.95.0","v0.94.0","v0.93.0","v0.92.0","v0.91.0","v0.90.0","v0.89.0","v0.88.0","v0.87.0","v0.86.0","v0.85.0","v0.84.0","v0.83.0","v0.82.0","v0.81.0","v0.80.0","v0.79.0","v0.78.0","v0.77.0","v0.76.0","v0.75.0","v0.74.0","v0.73.0","v0.72.0","v0.71.0","v0.70.0","v0.69.0","v0.68.0","v0.67.0","v0.66.0","v0.65.0","v0.64.0","v0.63.0","v0.62.0","v0.61.0","v0.60.0","v0.59.0","v0.58.0","v0.57.0","v0.56.0","v0.55.0","v0.54.0","v0.53.0","v0.52.0","v0.51.0","v0.50.0","v0.49.0","v0.48.0","v0.47.0","v0.46.0","v0.45.1","v0.45.0","v0.44.0","v0.43.0","v0.42.0","v0.41.0","v0.40.0","v0.39.0","v0.38.0","v0.37.0","v0.36.0","v0.35.0","v0.34.0","v0.33.0","v0.32.0","v0.31.0","v0.30.0","v0.29.0","v0.28.0","v0.27.0","v0.26.0","v0.25.0","v0.24.0","v0.23.0","v0.22.1","v0.22.0","v0.21.0","v0.20.0","v0.19.0","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.14.0","v0.13.0","v0.12.0","v0.11.0","v0.10.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76905.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}