PT-2026-50713 · Webmin · Webmin

Adem El Adeb · CVE-2026-56022 · Published 2026-06-18 · Updated 2026-06-24

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Webmin versions prior to 2.641

Description Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header. This behavior allows the bypass of additional multi-factor authentication (MFA) requirements. There have been reports of increased actor activities targeting this issue.

Recommendations Update to version 2.641.

Exploit

Fix

Weakness Enumeration

CWE-308

Related Identifiers

CVE-2026-56022

Affected Products

Webmin

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56022.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-56022 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-56022 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-56022 · Security Note
• https://github.com/webmin/webmin/releases/tag/2.641 · Note
• https://t.me/cveNotify/170644 · Telegram Post
• https://webmin.com/security/#webmin-prior-to-2641 · Note
• https://t.me/CVEtracker/57263 · Telegram Post
• https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json · Note
• https://twitter.com/vuldb/status/2068023150269644895 · Twitter Post
• https://t.me/cveNotify/174532 · Telegram Post