CVE-2026-49440

Name
CVE-2026-49440
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/denoland/deno/pull/34391
security-advisories@github.com https://github.com/denoland/deno/security/advisories/GHSA-9xg4-qhm4-g43w

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:deno:deno:*:*:*:*:*:*:*:* deno >= None < 2.8.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
deno edge-community 2.7.4-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.7.4-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.7.4-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r8 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r7 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r6 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r5 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r4 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r3 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.3.1-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.0.6-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno edge-community 2.0.6-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
deno 3.24-community 2.7.4-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable