{"id":"CVE-2026-41940","aliases":["EUVD-2026-26246","GHSA-85qr-8rxc-62gv"],"status":"published","title":"WebPros cPanel and WHM Authentication Bypass via Login Flow","description":"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.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.98527,"percentile":0.99921,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-306"],"published":"2026-04-29T15:10:37Z","modified":"2026-10-26T20:10:00Z","kev":{"date_added":"2026-04-30","due_date":"2026-05-03","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2026-04-30"},{"source":"kev","since":"2026-04-30"}],"exploits":[{"source":"metasploit","id":"exploit/multi/http/cpanel_whm_auth_bypass_rce","title":"cPanel/WHM CRLF Injection Authentication Bypass RCE","type":"exploit","platform":"Unix","date":"2026-04-28","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/multi/http/cpanel_whm_auth_bypass_rce"},{"source":"pocgithub","id":"Sachinart/CVE-2026-41940-cpanel-0day","title":"Sachinart/CVE-2026-41940-cpanel-0day","date":"2026-04-29","url":"https://github.com/Sachinart/CVE-2026-41940-cpanel-0day"},{"source":"pocgithub","id":"debugactiveprocess/cPanel-WHM-AuthBypass-Session-Checker","title":"debugactiveprocess/cPanel-WHM-AuthBypass-Session-Checker","date":"2026-04-29","url":"https://github.com/debugactiveprocess/cPanel-WHM-AuthBypass-Session-Checker"},{"source":"pocgithub","id":"0xabdoulaye/CPANEL-CVE-2026-41940","title":"0xabdoulaye/CPANEL-CVE-2026-41940","date":"2026-04-30","url":"https://github.com/0xabdoulaye/CPANEL-CVE-2026-41940"},{"source":"pocgithub","id":"Andrei-Dr/cpanel-cve-2026-41940-ioc","title":"Andrei-Dr/cpanel-cve-2026-41940-ioc","date":"2026-04-30","url":"https://github.com/Andrei-Dr/cpanel-cve-2026-41940-ioc"},{"source":"pocgithub","id":"Kagantua/cPanelWHM-AuthBypass","title":"Kagantua/cPanelWHM-AuthBypass","date":"2026-04-30","url":"https://github.com/Kagantua/cPanelWHM-AuthBypass"},{"source":"pocgithub","id":"Wesuiliye/CVE-2026-41940","title":"Wesuiliye/CVE-2026-41940","date":"2026-04-30","url":"https://github.com/Wesuiliye/CVE-2026-41940"},{"source":"pocgithub","id":"adriyansyah-mf/cve-2026-41940-poc","title":"adriyansyah-mf/cve-2026-41940-poc","date":"2026-04-30","url":"https://github.com/adriyansyah-mf/cve-2026-41940-poc"},{"source":"pocgithub","id":"assetnote/cpanel2shell-scanner","title":"assetnote/cpanel2shell-scanner","date":"2026-04-30","url":"https://github.com/assetnote/cpanel2shell-scanner"},{"source":"pocgithub","id":"ilmndwntr/CVE-2026-41940-MASS-EXPLOIT","title":"ilmndwntr/CVE-2026-41940-MASS-EXPLOIT","date":"2026-04-30","url":"https://github.com/ilmndwntr/CVE-2026-41940-MASS-EXPLOIT"},{"source":"pocgithub","id":"realawaisakbar/CVE-2026-41940-Exploit-PoC","title":"realawaisakbar/CVE-2026-41940-Exploit-PoC","date":"2026-04-30","url":"https://github.com/realawaisakbar/CVE-2026-41940-Exploit-PoC"},{"source":"pocgithub","id":"rfxn/cpanel-sessionscribe","title":"rfxn/cpanel-sessionscribe","date":"2026-04-30","url":"https://github.com/rfxn/cpanel-sessionscribe"},{"source":"pocgithub","id":"shahidmallaofficial/cpanel-cve-2026-41940-fix","title":"shahidmallaofficial/cpanel-cve-2026-41940-fix","date":"2026-04-30","url":"https://github.com/shahidmallaofficial/cpanel-cve-2026-41940-fix"},{"source":"pocgithub","id":"zedxod/CVE-2026-41940-POC","title":"zedxod/CVE-2026-41940-POC","date":"2026-04-30","url":"https://github.com/zedxod/CVE-2026-41940-POC"},{"source":"pocgithub","id":"0dev1337/cpanelscanner","title":"0dev1337/cpanelscanner","date":"2026-05-01","url":"https://github.com/0dev1337/cpanelscanner"},{"source":"pocgithub","id":"0xYuR1/CVE-2026-41940","title":"0xYuR1/CVE-2026-41940","date":"2026-05-01","url":"https://github.com/0xYuR1/CVE-2026-41940"},{"source":"pocgithub","id":"AmirrezaMarzban/portscan-CVE-2026-41940","title":"AmirrezaMarzban/portscan-CVE-2026-41940","date":"2026-05-01","url":"https://github.com/AmirrezaMarzban/portscan-CVE-2026-41940"},{"source":"pocgithub","id":"Jenderal92/CVE-2026-41940","title":"Jenderal92/CVE-2026-41940","date":"2026-05-01","url":"https://github.com/Jenderal92/CVE-2026-41940"},{"source":"pocgithub","id":"MrAriaNet/cPanel-Fix","title":"MrAriaNet/cPanel-Fix","date":"2026-05-01","url":"https://github.com/MrAriaNet/cPanel-Fix"},{"source":"pocgithub","id":"NULL200OK/cve-2026-41940-tool","title":"NULL200OK/cve-2026-41940-tool","date":"2026-05-01","url":"https://github.com/NULL200OK/cve-2026-41940-tool"},{"source":"pocgithub","id":"XsanFlip/poc-cpanel-cve-2026-41940","title":"XsanFlip/poc-cpanel-cve-2026-41940","date":"2026-05-01","url":"https://github.com/XsanFlip/poc-cpanel-cve-2026-41940"},{"source":"pocgithub","id":"ashrafzaryouh/CVE-2026-41940","title":"ashrafzaryouh/CVE-2026-41940","date":"2026-05-01","url":"https://github.com/ashrafzaryouh/CVE-2026-41940"},{"source":"pocgithub","id":"george1-adel/CVE-2026-41940_exploit","title":"george1-adel/CVE-2026-41940_exploit","date":"2026-05-01","url":"https://github.com/george1-adel/CVE-2026-41940_exploit"},{"source":"pocgithub","id":"kmaruthisrikar/CVE-2026-41940-cPanel-Auth-Bypass-Exploit","title":"kmaruthisrikar/CVE-2026-41940-cPanel-Auth-Bypass-Exploit","date":"2026-05-01","url":"https://github.com/kmaruthisrikar/CVE-2026-41940-cPanel-Auth-Bypass-Exploit"},{"source":"pocgithub","id":"mahfuzreham/cpanel-cve-2026-41940","title":"mahfuzreham/cpanel-cve-2026-41940","date":"2026-05-01","url":"https://github.com/mahfuzreham/cpanel-cve-2026-41940"},{"source":"pocgithub","id":"merdw/cPanel-CVE-2026-41940-Scanner","title":"merdw/cPanel-CVE-2026-41940-Scanner","date":"2026-05-01","url":"https://github.com/merdw/cPanel-CVE-2026-41940-Scanner"},{"source":"exploitdb","id":"EDB-52574","title":"cPanel - CRLF Injection","type":"webapps","platform":"php","date":"2026-05-26","url":"https://www.exploit-db.com/exploits/52574"},{"source":"nuclei","id":"CVE-2026-41940","title":"cPanel \u0026 WHM - Authentication Bypass via Session-File CRLF Injection","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-41940.yaml"}],"exploits_more":46,"products":[{"vendor":"cpanel","product":"cpanel"},{"vendor":"cpanel","product":"whm"},{"vendor":"cpanel","product":"wp_squared"},{"vendor":"webpros","product":"cpanel"},{"vendor":"webpros","product":"cpanel \u0026 whm and wp2 (wordpress squared)"},{"vendor":"webpros","product":"whm"},{"vendor":"webpros","product":"wp squared"}],"references":[{"url":"https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://docs.cpanel.net/release-notes/release-notes","tags":["release-notes","Release Notes"]},{"url":"https://docs.wpsquared.com/changelogs/versions/changelog/#13617","tags":["release-notes","Release Notes"]},{"url":"https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py","tags":["exploit","Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940","tags":["government-resource","US Government Resource"]},{"url":"https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/","tags":["Press/Media Coverage"]},{"url":"https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/","tags":["Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41940"},{"url":"https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940"},{"url":"https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks"},{"url":"https://github.com/advisories/GHSA-85qr-8rxc-62gv"}],"sources":{"cve":[{"id":"CVE-2026-41940","title":"WebPros cPanel and WHM Authentication Bypass via Login Flow","description":"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.","status":"published","published":"2026-04-29T15:10:37.899Z","modified":"2026-09-30T17:20:17.713Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T13:41:08.498858Z"}],"euvd":[{"id":"EUVD-2026-26246","description":"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.","status":"published","published":"2026-04-29T15:10:37Z","modified":"2026-09-30T17:20:17Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"exploited_since":"2026-04-30","updated_at":"2026-11-02T17:27:48.075372Z"}],"ghsa":[{"id":"GHSA-85qr-8rxc-62gv","title":"cPanel and WHM versions prior to 11.110.0.97, 11.118.0.63, 11.126.0.54, 11.132.0.29, 11.134.0.20,...","description":"cPanel and WHM versions prior to 11.110.0.97, 11.118.0.63, 11.126.0.54, 11.132.0.29, 11.134.0.20, and 11.136.0.5 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.","status":"published","published":"2026-04-29T18:31:35Z","modified":"2026-05-04T18:31:33Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:07:54.172768Z"}],"kev":[{"id":"CVE-2026-41940","title":"WebPros cPanel \u0026 WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability","description":"WebPros cPanel \u0026 WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.","cwes":["CWE-306"],"kev":{"date_added":"2026-04-30","due_date":"2026-05-03","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2026-41940","description":"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.","status":"published","published":"2026-04-29T16:16:25.037Z","modified":"2026-10-26T20:10:00.16Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:12:16.626888Z"}]}}
