CVE-2026-42482: Hashcat

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A stack-based buffer overflow in mangle_to_hex_lower() and mangle_to_hex_upper() in src/rp_cpu.c in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted rule file, or via the -j or -k rule options used with password candidates of 128 or more characters. The vulnerability is caused by a bounds check that fails to account for the 2x expansion that occurs when password bytes are converted to hexadecimal.

Affected products

• Hashcat Hashcat: version 7.1.2 only

Published 2026-05-01. Last modified 2026-06-17.