RCE in Evank Web::passwd

CVE-2026-8500

Web::Passwd versions through 0.03 for Perl is vulnerable to RCE. Web::Passwd is a small CGI application for managing htpasswd files using the htpasswd command. The user parameter is not validated or escaped, and is used as the last argument on the command line, allowing for command injection.

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.0th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-8500: rose from 0.017 to 0.025.

EPSS over last 30 days · oldest: 0.017 · newest: 0.025 · change: +0.008

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-8500?
CVE-2026-8500 is a critical-severity vulnerability in Evank Web::passwd, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-05-13.
How severe is CVE-2026-8500?
Critical severity. CVSS v3 base score is 9.8 out of 10.