{"cve":"CVE-2006-3251","nvd":{"published":"2006-06-27T18:05:00.000","modified":"2026-06-16T22:26:42.433","status":"Modified","description":"Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-119"],"references":["http://secunia.com/advisories/20800","http://secunia.com/advisories/20846","http://secunia.com/advisories/21146","http://www.debian.org/security/2006/dsa-1114","http://www.gentoo.org/security/en/glsa/glsa-200606-25.xml"],"products":["hashcash:hashcash"],"source":"nvd","synced_at":"2026-10-19T19:42:44.451428143+00:00"},"epss":{"cve":"CVE-2006-3251","score":0.03654,"percentile":0.89613,"date":"2026-11-01"},"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."]}