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This issue is fixed in version 1.4.29.","state":0,"publishedAt":"2026-07-08T20:25:18.2+00:00","modifiedAt":"2026-07-10T15:02:07.512+00:00","affected":[{"ecosystem":"Vendor product","name":"elysia","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"elysiajs\",\n                    \"product\": \"elysia\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.4.29\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx","https://github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329","https://gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9","https://github.com/elysiajs/elysia/releases/tag/1.4.29"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-56669","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-56669","identifiers":["CVE-2026-56669"]},"retained":false,"historicalAffected":[]},{"revision":"d2378f9d955a465a9449a5d69ffa892e","observedAt":"2026-11-07T12:36:29.465+00:00","statement":{"source":"euvd","id":"EUVD-2026-42394","aliases":["CVE-2026-56669","GHSA-9643-4qgh-g8mx"],"title":"Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. 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This issue is fixed in version 1.4.29.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":null}],"references":["https://github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx","https://github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329","https://gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9","https://github.com/elysiajs/elysia/releases/tag/1.4.29"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-42394","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 8, 2026, 8:25:18 PM","dateUpdated":"Jul 10, 2026, 3:02:07 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-42394","identifiers":["EUVD-2026-42394","CVE-2026-56669","GHSA-9643-4qgh-g8mx"]},"retained":false,"historicalAffected":[]},{"revision":"12deca79d6ad4de0a3a77b451f1b986d","observedAt":"2026-10-27T15:15:18.401+00:00","statement":{"source":"nvd","id":"CVE-2026-56669","aliases":[],"title":"Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to 1.4.29, Elysia uses getAll in form data normalization for multipart/form-data endpoints, causing the a…","description":"Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to 1.4.29, Elysia uses getAll in form data normalization for multipart/form-data endpoints, causing the amount of work to grow quadratically with the number of unique key-value pairs and allowing CPU exhaustion. This issue is fixed in version 1.4.29.","state":0,"publishedAt":"2026-07-08T21:16:50.69+00:00","modifiedAt":"2026-10-25T17:10:00.197+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9","https://github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329","https://github.com/elysiajs/elysia/releases/tag/1.4.29","https://github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56669","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-407","CWE-436"],"productCriteria":[],"sourceDates":{"published":"2026-07-08T21:16:50.690","lastModified":"2026-10-25T17:10:00.197"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-56669","identifiers":["CVE-2026-56669"]},"retained":false,"historicalAffected":[]},{"revision":"08bf19e05ae84b1b826352e2be243f9c","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-9643-4qgh-g8mx","aliases":["CVE-2026-56669"],"title":"elysia has Inefficient Algorithmic Complexity and Interpretation Conflict","description":"Elysia v1.4.28 is vulnerable to denial-of-service attacks due to CPU exhaustion in the form data normalization code.\n\nElysia uses `getAll` to retrieve value from FormData. It is called directly relative to the total number of key-value pairs in the form data. The total amount of work the for loop has to do grows quadratically, so doubling the number of unique key-value pairs quadruples the amount of work. In the above PoC, each .getAll call scans through all of the `n` key-value pairs in the form data. Because there are `n` unique keys in the form data, there are .getAll calls, so in total the form data normalizer has to scan `n` x `n` key-value pairs.\n\n### Impact\nEndpoints using `multipart/form-data`\n\n### Patches\n1.4.29\n\n### Workarounds\nno 100% confirm workaround beside updating the patch","state":0,"publishedAt":"2026-09-23T21:54:50+00:00","modifiedAt":"2026-09-23T22:00:04.4299699+00:00","affected":[{"ecosystem":"npm","name":"elysia","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.4.29"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/elysiajs/elysia/security/advisories/GHSA-9643-4qgh-g8mx","https://nvd.nist.gov/vuln/detail/CVE-2026-56669","https://github.com/elysiajs/elysia/commit/8358ff9efbcedf9534995f5977f26b9ceab59329","https://gist.github.com/jviide/ea040eabe7bac058326174e2cd42dfd9","https://github.com/elysiajs/elysia","https://github.com/elysiajs/elysia/releases/tag/1.4.29"],"sourceUrl":"https://github.com/advisories/GHSA-9643-4qgh-g8mx","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-9643-4qgh-g8mx","identifiers":["GHSA-9643-4qgh-g8mx","CVE-2026-56669"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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