{"id":"EUVD-2026-38540","revision":"c87f7785c191461480ccf1f7872fab0f","records":[{"revision":"c87f7785c191461480ccf1f7872fab0f","observedAt":"2026-11-05T10:41:50.055+00:00","statement":{"source":"euvd","id":"EUVD-2026-38540","aliases":["CVE-2026-49440","GHSA-9xg4-qhm4-g43w"],"title":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, node:crypto.checkPrime(candidate[, options][, callback]) and crypto.checkPrimeSync(candidate[, options]) ran no Miller-Rabin rounds at all when the caller left optio…","description":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, node:crypto.checkPrime(candidate[, options][, callback]) and crypto.checkPrimeSync(candidate[, options]) ran no Miller-Rabin rounds at all when the caller left options.checks at its default of 0. In that mode, the only test applied to the candidate was trial division by the primes up to 17,863. Any composite whose smallest prime factor exceeds that bound — for example the product of two primes just above it, such as 17,881 × 17,891 — was reported as true (\"probably prime\"). The same divergence affected the lower-level op_node_check_prime / op_node_check_prime_bytes paths that the polyfill calls into. This vulnerability is fixed in 2.8.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4,"severity":null}],"references":["https://github.com/denoland/deno/security/advisories/GHSA-9xg4-qhm4-g43w","https://github.com/denoland/deno/pull/34391"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38540","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 23, 2026, 5:13:25 PM","dateUpdated":"Jun 25, 2026, 1:48:28 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-2026-38540","identifiers":["EUVD-2026-38540","CVE-2026-49440","GHSA-9xg4-qhm4-g43w"]},"retained":false,"historicalAffected":[]}],"coverage":[]}