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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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:117453c6411f71ada17000e91c24dd4fedabe20fdcabaeb7b60b889a265657a8
Known exploited
CISA KEV
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 assertions

{"defaultStatus":"affected","product":"WHM","vendor":"WebPros","versions":[{"lessThan":"11.86.0.41","status":"affected","version":"11.40.0.0","versionType":"custom"},{"lessThan":"11.94.0.28","status":"affected","version":"11.88.0.0","versionType":"custom"},{"lessThan":"11.102.0.39","status":"affected","version":"11.96.0.0","versionType":"custom"},{"lessThan":"11.110.0.97","status":"affected","version":"11.104.0.0","versionType":"custom"},{"lessThan":"11.118.0.63","status":"affected","version":"11.112.0.0","versionType":"custom"},{"lessThan":"11.124.0.35","status":"affected","version":"11.120.0…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/affected/2

{"defaultStatus":"affected","product":"WP Squared","vendor":"WebPros","versions":[{"status":"unaffected","version":"11.136.1.7","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/affected/1

{"defaultStatus":"affected","product":"cPanel","vendor":"WebPros","versions":[{"lessThan":"11.86.0.41","status":"affected","version":"11.40.0.0","versionType":"custom"},{"lessThan":"11.94.0.28","status":"affected","version":"11.88.0.0","versionType":"custom"},{"lessThan":"11.102.0.39","status":"affected","version":"11.96.0.0","versionType":"custom"},{"lessThan":"11.110.0.97","status":"affected","version":"11.104.0.0","versionType":"custom"},{"lessThan":"11.118.0.63","status":"affected","version":"11.112.0.0","versionType":"custom"},{"lessThan":"11.124.0.35","status":"affected","version":"11.12…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/affected/0
cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

3 source assertions
{"defaultStatus":"affected","product":"WHM","vendor":"WebPros","versions":[{"lessThan":"11.86.0.41","status":"affected","version":"11.40.0.0","versionType":"custom"},{"lessThan":"11.94.0.28","status":"affected","version":"11.88.0.0","versionType":"custom"},{"lessThan":"11.102.0.39","status":"affected","version":"11.96.0.0","versionType":"custom"},{"lessThan":"11.110.0.97","status":"affected","version":"11.104.0.0","versionType":"custom"},{"lessThan":"11.118.0.63","status":"affected","version":"11.112.0.0","versionType":"custom"},{"lessThan":"11.124.0.35","status":"affected","version":"11.120.0…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/affected/2
{"defaultStatus":"affected","product":"WP Squared","vendor":"WebPros","versions":[{"status":"unaffected","version":"11.136.1.7","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/affected/1
{"defaultStatus":"affected","product":"cPanel","vendor":"WebPros","versions":[{"lessThan":"11.86.0.41","status":"affected","version":"11.40.0.0","versionType":"custom"},{"lessThan":"11.94.0.28","status":"affected","version":"11.88.0.0","versionType":"custom"},{"lessThan":"11.102.0.39","status":"affected","version":"11.96.0.0","versionType":"custom"},{"lessThan":"11.110.0.97","status":"affected","version":"11.104.0.0","versionType":"custom"},{"lessThan":"11.118.0.63","status":"affected","version":"11.112.0.0","versionType":"custom"},{"lessThan":"11.124.0.35","status":"affected","version":"11.12…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-306","description":"CWE-306 Missing Authentication for Critical Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/problemTypes/0/descriptions/0

Known exploitation assertions

2 source assertions
{"cwes":["CWE-306"],"dateAdded":"2026-04-30","dueDate":"2026-05-03","knownRansomwareCampaignUse":"Known","notes":"https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ; https://docs.cpanel.net/release-notes/release-notes/ ; https://docs.wpsquared.com/changelogs/versions/changelog/#13617 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41940\"","product":"cPanel & WHM and WP2 (WordPress Squared)","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitiga…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:f112d026b7db8e11ba1395d8481217ff2a1039ce1b158d078e63cea480f6453e · sha256:16acee8334e59e44… · /vulnerabilities/71
    Open source location →
{"cwes":["CWE-306"],"dateAdded":"2026-04-30","dueDate":"2026-05-03","knownRansomwareCampaignUse":"Known","notes":"https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ; https://docs.cpanel.net/release-notes/release-notes/ ; https://docs.wpsquared.com/changelogs/versions/changelog/#13617 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41940\"","product":"cPanel & WHM and WP2 (WordPress Squared)","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitiga…
  • cisa_kev_jsonknown_exploited
    urn:baitaphish:normalized-source-record:v2:5fba29e6c5d4459863b941a7dd43255c1bce81a99ffd1ef79aa77145bec729b7 · sha256:635dff916c4092c0… · /vulnerabilities/74
    Open source location →

Source references

9 source assertions
{"tags":["release-notes"],"url":"https://docs.cpanel.net/release-notes/release-notes"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/references/1
{"tags":["release-notes"],"url":"https://docs.wpsquared.com/changelogs/versions/changelog/#13617"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/references/2
{"tags":["exploit"],"url":"https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/adp/0/references/0
{"url":"https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/adp/1/references/1
{"tags":["vendor-advisory","patch"],"url":"https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/references/0
{"url":"https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/adp/1/references/0
{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/adp/0/references/1
{"tags":["third-party-advisory"],"url":"https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/references/3
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1b687707747d8a506c238d8029caa68d1c06982f34e243fd8e1fee4a0cb7ac4 · sha256:7c68e8e1250489d4… · /containers/cna/references/4

Attribution and limitations

  • CISA Known Exploited Vulnerabilities JSON: CISA named for provenance; do not use CISA/DHS marks or imply endorsement Source →
  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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