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    CVE-2026-41940

    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:Apr 29, 2026
    Last Modified:May 4, 2026
    EPS:Apr 29, 2026
    EPSS Score:0.28361
    CVSS Score:9.8

    CISA Notification

    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.

    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.

    Notes:

    No extra notes provided.

    Due Date
    May 3, 2026
    131 days ago
    Alert Date
    Apr 30, 2026
    134 days ago

    Affected Products

    Vendor
    Cpanel
    Product
    Cpanel
    Vendor
    Cpanel
    Product
    Whm
    Vendor
    Cpanel
    Product
    Wp Squared

    Exploits

    https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.pyhttps://www.exploit-db.com/exploits/52574https://github.com/0dev1337/cpanelscannerhttps://github.com/0xabdoulaye/CPANEL-CVE-2026-41940https://github.com/0xBlackash/CVE-2026-41940https://github.com/0xgh057r3c0n/CVE-2026-41940https://github.com/0xYuR1/CVE-2026-41940https://github.com/3tternp/CVE-2026-41940---cPanel-WHM-checkhttps://github.com/44pie/cpsniperhttps://github.com/acuciureanu/cpanel2shell-honeypothttps://github.com/adriyansyah-mf/cve-2026-41940-pochttps://github.com/AmirrezaMarzban/portscan-CVE-2026-41940https://github.com/anach-ai/CVE-2026-41940https://github.com/Andrei-Dr/cpanel-cve-2026-41940-iochttps://github.com/AnotherSec/CVE-2026-41940https://github.com/asdasddqwdq29-a11y/CVE-2026-41940https://github.com/assetnote/cpanel2shell-scannerhttps://github.com/branixsolutions/Security-CVE-2026-41940-cPanel-WHM-WP2https://github.com/bughunt4me/cpanelCVE-2026-41940https://github.com/CerberusMrXi/cPanel-WHM-CVE-2026-41940-auth-bypass-exploithttps://github.com/debugactiveprocess/cPanel-WHM-AuthBypass-Session-Checkerhttps://github.com/Defacto-ridgepole254/CVE-2026-41940-Exploit-PoChttps://github.com/dennisec/CVE-2026-41940https://github.com/devtint/CVE-2026-41940https://github.com/george1-adel/CVE-2026-41940_exploithttps://github.com/habibkaratas/sorry-ransomware-analysishttps://github.com/ilmndwntr/CVE-2026-41940-MASS-EXPLOIThttps://github.com/imbas007/POC_CVE-2026-41940https://github.com/iSee857/cPanel-WHM-CVE-2026-41940-AuthBypasshttps://github.com/Ishanoshada/CVE-2026-41940-Exploit-PoChttps://github.com/itsismarcos/CVE-2026-41940https://github.com/Jenderal92/CVE-2026-41940https://github.com/Kagantua/cPanelWHM-AuthBypasshttps://github.com/keithbennedict/CVE-2026-41940-Linuxhttps://github.com/kmaruthisrikar/CVE-2026-41940-cPanel-Auth-Bypass-Exploithttps://github.com/lanicer/cve-2026-41940-PoChttps://github.com/limo57640-crypto/cpanel-cve-41940-detectorhttps://github.com/linko-iheb/cve-2026-41940-scannerhttps://github.com/Lutfifakee-Project/CVE-2026-41940https://github.com/mahfuzreham/cpanel-cve-2026-41940https://github.com/merdw/cPanel-CVE-2026-41940-Scannerhttps://github.com/MrAriaNet/cPanel-Fixhttps://github.com/MrOplus/CVE-2026-41940https://github.com/murrez/CVE-2026-41940https://github.com/ngksiva/cpanel-forensicshttps://github.com/nickpaulsec/2026-41940-pochttps://github.com/NULL200OK/cve-2026-41940-toolhttps://github.com/oguz-kagan-akar/CVE-2026-41940-analysishttps://github.com/OhmGun/whmxploit---CVE-2026-41940https://github.com/razureink/cve-2026-41940-cpanel_authbypass_reproductionhttps://github.com/rdyprtmx/poc-cve-2026-41940https://github.com/realawaisakbar/CVE-2026-41940-Exploit-PoChttps://github.com/rfxn/cpanel-sessionscribehttps://github.com/Richflexpix/cpanel-pwnhttps://github.com/Rosemary1337/CVE-2026-41940https://github.com/Sachinart/CVE-2026-41940-cpanel-0dayhttps://github.com/sardine-web/Automated-scanner-CVE-2026-41940https://github.com/senyx122/CVE-2026-41940https://github.com/sercanokur/CVE-2026-41940-cPanel-WHM-Verification-Toolhttps://github.com/shahidmallaofficial/cpanel-cve-2026-41940-fixhttps://github.com/SreejaPuthan/cpanel-control-plane-exposure-checkhttps://github.com/t4xo/CVE-2026-41940https://github.com/tc4dy/CVE-2026-41940-PoC-Exploithttps://github.com/tfawnies/CVE-2026-41940-nexthttps://github.com/thekawix/CVE-2026-41940https://github.com/Underh0st/CPanel-Audit-Remediation-Toolhttps://github.com/Unfold-Security/CVE-2026-41940-Detectionhttps://github.com/unteikyou/CVE-2026-41940-AuthBypass-Detectorhttps://github.com/vineet7800/cpanel-malware-cleaner-cve-2026https://github.com/Wesuiliye/CVE-2026-41940https://github.com/willygailo/CVE-2026-41940-Linuxhttps://github.com/Xrzmodz444/cve-2026-41940-PoC-Linuxhttps://github.com/XsanFlip/poc-cpanel-cve-2026-41940https://github.com/xxconi/CVE-2026-41940https://github.com/yanchenyu360/CVE-2026-41940-Security-Patchhttps://github.com/ynsmroztas/cPanelSniperhttps://github.com/yurahshell/CVE-2026-41940https://github.com/zedxod/CVE-2026-41940-POChttps://github.com/ZildanZ/CVE-2026-41940https://github.com/zwanski2019/cPanelSniper

    Related CVEs

    CVE-2026-65643 (CVSS 8.7) — Eval injection in cPanel 11.138.0.0 and earlier allows remote authenticated users to execute arbitrary code as…
    CVE-2026-29205 (CVSS 8.6) — Incorrect privileges management and insufficient path filtering allow to read arbitrary file on the server via…
    CVE-2026-32992 (CVSS 8.2) — SSL verification is disabled in the DNS Cluster system. This could allow for a malicious server to man-in-the-…
    CVE-2025-66429 (CVSS 8.8) — An issue was discovered in cPanel 110 through 132. A directory traversal vulnerability within the Team Manager…
    CVE-2023-29489 (CVSS 5.3) — An issue was discovered in cPanel before 11.109.9999.116. XSS can occur on the cpsrvd error page via an invali…
    CVE-2021-38584 (CVSS 7.2) — The WHM Locale Upload feature in cPanel before 98.0.1 allows XXE attacks (SEC-585).…
    CVE-2021-38585 (CVSS 7.2) — The WHM Locale Upload feature in cPanel before 98.0.1 allows unserialization attacks (SEC-585).…
    CVE-2021-38586 (CVSS 4.4) — In cPanel before 98.0.1, /scripts/cpan_config performs unsafe operations on files (SEC-589).…
    CVE-2021-38587 (CVSS 7.5) — In cPanel before 96.0.13, scripts/fix-cpanel-perl mishandles the creation of temporary files (SEC-586).…
    CVE-2021-38588 (CVSS 8.1) — In cPanel before 96.0.13, fix_cpanel_perl lacks verification of the integrity of downloads (SEC-587).…

    References

    https://docs.cpanel.net/release-notes/release-notes
    https://docs.wpsquared.com/changelogs/versions/changelog/#13617
    https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026
    https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026
    https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow
    https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/
    https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/
    https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High