CVE-2026-42484: A heap-based buffer overflow in hex_to_binary in the PKZIP hash parser in hashcat v7.1.2 allows an attacker to cause a…
CVE-2026-42484 · Severity: critical · CVSS 9.8 · Published 2026-05-01
A heap-based buffer overflow in hex_to_binary in the PKZIP hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted PKZIP hash file. The issue affects modules 17200, 17210, 17220, 17225, and 17230. When data_type_enum<=1, attacker-controlled hex data from a user-supplied hash string is decoded into a fixed-size buffer without proper input-length validation.
No. Junglewise Threat Intelligence has no report of CVE-2026-42484 being exploited in the wild.
How severe is CVE-2026-42484?
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-2026-42484?
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-2026-42484?
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.