CVE-2026-41940

🗓️ 29 Apr 2026 15:10:37Reported by VulnCheckType

cve🔗 web.nvd.nist.gov📰️ 113 Media mentions👁 594 Views🌐 WEB

Authentication bypass in cPanel login flow allows unauthenticated remote access on older versions.

Reporter	Title	Published	Views	Family All 93
GithubExploit	Exploit for Missing Authentication for Critical Function in Cpanel	1 May 202616:27	–	githubexploit
GithubExploit	Exploit for Missing Authentication for Critical Function in Cpanel	6 Jun 202612:49	–	githubexploit
GithubExploit	Exploit for Missing Authentication for Critical Function in Cpanel	27 May 202600:16	–	githubexploit
GithubExploit	Exploit for Missing Authentication for Critical Function in Cpanel	8 May 202614:05	–	githubexploit
GithubExploit	indo-cpanel-exploit	26 May 202619:59	–	githubexploit
GithubExploit	Exploit for Missing Authentication for Critical Function in Cpanel	5 May 202623:39	–	githubexploit
GithubExploit	Exploit for CVE-2026-41940	30 Apr 202617:08	–	githubexploit
GithubExploit	Exploit for Missing Authentication for Critical Function in Cpanel	23 Jul 202615:42	–	githubexploit
GithubExploit	Exploit for CVE-2026-41940	30 Apr 202608:11	–	githubexploit
GithubExploit	Exploit for Missing Authentication for Critical Function in Cpanel	1 May 202612:09	–	githubexploit

NVD

Vulners

CNA

Node

cpanel cpanelRange11.40–86.0.41

cpanel cpanelRange88.0.0–110.0.97

cpanel cpanelRange112.0.0–118.0.63

cpanel cpanelRange120.0.0–124.0.35

cpanel cpanelRange126.0.1–126.0.54

cpanel cpanelRange128.0.0–130.0.19

cpanel cpanelRange132.0.0–132.0.29

cpanel cpanelRange134.0.0–134.0.20

cpanel cpanelRange136.0.0–136.0.5

Node

cpanel whmRange11.40–86.0.41

cpanel whmRange88.0.0–110.0.97

cpanel whmRange112.0.0–118.0.63

cpanel whmRange120.0.0–124.0.35

cpanel whmRange126.0.1–126.0.54

cpanel whmRange128.0.0–130.0.19

cpanel whmRange132.0.0–132.0.29

cpanel whmRange134.0.0–134.0.20

cpanel whmRange136.0.0–136.0.5

Node

cpanel wp_squaredRange<136.1.7wordpress

[
  {
    "defaultStatus": "affected",
    "vendor": "WebPros",
    "product": "cPanel",
    "versions": [
      {
        "status": "affected",
        "version": "11.40.0.0",
        "versionType": "custom",
        "lessThan": "11.86.0.41"
      },
      {
        "status": "affected",
        "version": "11.88.0.0",
        "versionType": "custom",
        "lessThan": "11.94.0.28"
      },
      {
        "status": "affected",
        "version": "11.96.0.0",
        "versionType": "custom",
        "lessThan": "11.102.0.39"
      },
      {
        "status": "affected",
        "version": "11.104.0.0",
        "versionType": "custom",
        "lessThan": "11.110.0.97"
      },
      {
        "status": "affected",
        "version": "11.112.0.0",
        "versionType": "custom",
        "lessThan": "11.118.0.63"
      },
      {
        "status": "affected",
        "version": "11.120.0.0",
        "versionType": "custom",
        "lessThan": "11.124.0.35"
      },
      {
        "status": "affected",
        "version": "11.126.0.0",
        "versionType": "custom",
        "lessThan": "11.126.0.54"
      },
      {
        "status": "affected",
        "version": "11.128.0.0",
        "versionType": "custom",
        "lessThan": "11.130.0.19"
      },
      {
        "status": "affected",
        "version": "11.132.0.0",
        "versionType": "custom",
        "lessThan": "11.132.0.29"
      },
      {
        "status": "affected",
        "version": "11.134.0.0",
        "versionType": "custom",
        "lessThan": "11.134.0.20"
      },
      {
        "status": "affected",
        "version": "11.136.0.0",
        "versionType": "custom",
        "lessThan": "11.136.0.5"
      }
    ]
  },
  {
    "defaultStatus": "affected",
    "vendor": "WebPros",
    "product": "WP Squared",
    "versions": [
      {
        "status": "unaffected",
        "version": "11.136.1.7",
        "versionType": "custom"
      }
    ]
  },
  {
    "defaultStatus": "affected",
    "vendor": "WebPros",
    "product": "WHM",
    "versions": [
      {
        "status": "affected",
        "version": "11.40.0.0",
        "versionType": "custom",
        "lessThan": "11.86.0.41"
      },
      {
        "status": "affected",
        "version": "11.88.0.0",
        "versionType": "custom",
        "lessThan": "11.94.0.28"
      },
      {
        "status": "affected",
        "version": "11.96.0.0",
        "versionType": "custom",
        "lessThan": "11.102.0.39"
      },
      {
        "status": "affected",
        "version": "11.104.0.0",
        "versionType": "custom",
        "lessThan": "11.110.0.97"
      },
      {
        "status": "affected",
        "version": "11.112.0.0",
        "versionType": "custom",
        "lessThan": "11.118.0.63"
      },
      {
        "status": "affected",
        "version": "11.120.0.0",
        "versionType": "custom",
        "lessThan": "11.124.0.35"
      },
      {
        "status": "affected",
        "version": "11.126.0.0",
        "versionType": "custom",
        "lessThan": "11.126.0.54"
      },
      {
        "status": "affected",
        "version": "11.128.0.0",
        "versionType": "custom",
        "lessThan": "11.130.0.19"
      },
      {
        "status": "affected",
        "version": "11.132.0.0",
        "versionType": "custom",
        "lessThan": "11.132.0.29"
      },
      {
        "status": "affected",
        "version": "11.134.0.0",
        "versionType": "custom",
        "lessThan": "11.134.0.20"
      },
      {
        "status": "affected",
        "version": "11.136.0.0",
        "versionType": "custom",
        "lessThan": "11.136.0.5"
      }
    ]
  }
]

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

Parameter	Position	Path	Description	CWE
Authorization	header	/	CRLF injection via Basic auth header and obfuscated session cookie to write injected fields into cpsrvd raw session file	CWE-306
Cookie	header	/	CRLF injection via Basic auth header and obfuscated session cookie to write injected fields into cpsrvd raw session file	CWE-306
Cookie	header	/scripts2/listaccts	Triggering session cache promotion by accessing listaccts with a crafted whostmgrsession to promote injected fields into the authoritative session cache	CWE-306
Cookie	header	/<token>/json-api/version	Check for auth bypass by querying WHM json-api/version using the vulnerable session token to confirm root access	CWE-306
user	body	/<token>/json-api/passwd	Set a temporary root password via the passwd API to establish root access after bypass	CWE-306
password	body	/<token>/json-api/passwd	Set a temporary root password via the passwd API to establish root access after bypass	CWE-306

17 Jun 2026 10:47Current

5.5Medium risk

Vulners AI Score5.5

CVSS 49.3

CVSS 3.19.8

EPSS0.96459

SSVC