CVE-2026-42482: 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…
CVE-2026-42482 · Severity: critical · CVSS 9.8 · Published 2026-05-01
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-42482 being exploited in the wild.
How severe is CVE-2026-42482?
Critical severity, with a CVSS score of 9.8, published 1 May 2026.
Which products and versions are affected?
Hashcat. The advisory does not name versions.
Is there a fix for CVE-2026-42482?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-42482?
Check whether you run Hashcat. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.