{"cve":"CVE-2026-41564","nvd":{"published":"2026-04-23T08:16:01.243","modified":"2026-10-26T22:10:00.163","status":"Analyzed","description":"CryptX versions before 0.088 for Perl do not reseed the Crypt::PK PRNG state after forking.\n\nThe Crypt::PK::RSA, Crypt::PK::DSA, Crypt::PK::DH, Crypt::PK::ECC, Crypt::PK::Ed25519 and Crypt::PK::X25519 modules seed a per-object PRNG state in their constructors and reuse it without fork detection. A Crypt::PK::* object created before `fork()` shares byte-identical PRNG state with every child process, and any randomized operation they perform can produce identical output, including key generation. Two ECDSA or DSA signatures from different processes are enough to recover the signing private key through nonce-reuse key recovery.\n\nThis affects preforking services such as the Starman web server, where a Crypt::PK::* object loaded at startup is inherited by every worker process.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-335","CWE-338"],"references":["https://github.com/DCIT/perl-CryptX/commit/9a1dd3e0c27d68e32450be5538b864c2b115ee15.patch","https://github.com/DCIT/perl-CryptX/security/advisories/GHSA-24c2-gp6c-24c6","https://metacpan.org/release/MIK/CryptX-0.088","http://www.openwall.com/lists/oss-security/2026/04/23/2","https://github.com/DCIT/perl-CryptX/security/advisories/GHSA-24c2-gp6c-24c6"],"products":["dcit:cryptx"],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-41564","score":0.00431,"percentile":0.37045,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}