{"id":"CVE-2026-41940","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-41940","summary":"cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.","details":"cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.","published":"2026-04-29T15:10:37.899Z","modified":"2026-08-11T03:55:30.673Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.98527,"percentile":0.99917,"asOf":"2026-08-26"},"cisaKev":{"dateAdded":"2026-04-30","dueDate":"2026-05-03","knownRansomwareCampaignUse":true},"exploitsKnown":24,"affectedPackages":[],"fix":null,"references":[{"type":"FIX","url":"https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026"},{"type":"WEB","url":"https://docs.cpanel.net/release-notes/release-notes"},{"type":"WEB","url":"https://docs.wpsquared.com/changelogs/versions/changelog/#13617"},{"type":"ADVISORY","url":"https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow"},{"type":"EXPLOIT","url":"https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940"},{"type":"WEB","url":"https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/"},{"type":"WEB","url":"https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/"}],"provenance":{"sources":["OSV.dev","NVD","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2026-08-11T03:55:30.673Z"}}