CVE-2026-41940

CRITICALNVD 9.89.8—Trending — 4 sources updated this weekExploited in the wild

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 99.6%
KEV: ⚠ Exploited

Published

April 29, 2026

Last Modified

May 4, 2026

Advisory Details (8)

Auto-updated May 12, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940

generic

GitHub - watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py · GitHub

https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py

generic🔴 Active Exploitation

Critrical cPanel flaw mass-exploited in "Sorry" ransomware attacks

https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/

generic

The Internet Is Falling Down, Falling Down, Falling Down (cPanel & WHM Authentication Bypass CVE-2026-41940)

https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/

generic

WebPros cPanel and WHM Authentication Bypass via Login Flow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow

generic

Namecheap Status - Namecheap Status

https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026

generic

WP Squared Changelog - WP2

https://docs.wpsquared.com/changelogs/versions/changelog/#13617

generic🔴 Active Exploitation

Release Notes | cPanel & WHM Documentation

https://docs.cpanel.net/release-notes/release-notes

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-306Missing Authentication for Critical Function

Data Freshness Timeline

(refreshed 14× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 23:18 UTCEG score recompute
2026-05-31 23:18 UTCGHSA enrichment
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 22:20 UTCkev_newly_listed
2026-05-27 20:35 UTCkev_newly_listed
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 19:13 UTCkev_newly_listed
2026-05-26 13:44 UTCepss_batch
2026-05-22 19:13 UTCkev_newly_listed
2026-05-21 22:36 UTCkev_newly_listed
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 17:33 UTCkev_newly_listed
2026-05-20 11:22 UTCepss_batch

Publicly available exploits

(10 references)

Working exploit code is in the public domain (9 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-52574
First seen May 26, 2026
cPanel - CRLF Injection
Open source ↗
GitHub PoCbughunt4me/cpanelCVE-2026-41940
First seen May 6, 2026
CVE-2026-41940 Auto Root Login
Open source ↗
GitHub PoCXsanFlip/poc-cpanel-cve-2026-41940
First seen May 1, 2026
Open source ↗
GitHub PoCynsmroztas/cPanelSniper
First seen May 1, 2026
CVE-2026-41940 — cPanel & WHM Authentication Bypass via Session-File CRLF Injection
Open source ↗
GitHub PoCKagantua/cPanelWHM-AuthBypass
First seen Apr 30, 2026
CVE-2026-41940
Open source ↗
GitHub PoCassetnote/cpanel2shell-scanner
First seen Apr 30, 2026
High fidelity scanner for CVE-2026-41940 (cPanel & WHM authentication bypass)
Open source ↗
GitHub PoCadriyansyah-mf/cve-2026-41940-poc
First seen Apr 30, 2026
Open source ↗
GitHub PoCilmndwntr/CVE-2026-41940-MASS-EXPLOIT
First seen Apr 30, 2026
CVE-2026-41940 SUPPORT SINGLE & MASS SCAN EXPLOIT
Open source ↗
GitHub PoCrfxn/cpanel-sessionscribe
First seen Apr 30, 2026
Detection, mitigation, and reverse-engineering tooling for CVE-2026-41940 (SessionScribe): the cPanel/WHM unauthenticated session-forgery vulnerability disclosed 2026-04-28. Defense-in-depth active mitigation shim, ModSec rule pack, remote probe, on-host IOC scanner, and per-tier RE snapshot collector. GPL v2.
Open source ↗
GitHub PoCrealawaisakbar/CVE-2026-41940-Exploit-PoC
First seen Apr 30, 2026
This repository contains a Proof-of-Concept (PoC) exploit for CVE-2026-41940, a critical authentication bypass vulnerability in cPanel & WHM. The vulnerability allows unauthenticated remote attackers to gain unauthorized access to the control panel by abusing flaws in the login flow.
Open source ↗

Frequently asked(6)

What is CVE-2026-41940?

CVE-2026-41940 is a critical vulnerability published on April 29, 2026. 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.

When was CVE-2026-41940 disclosed?

CVE-2026-41940 was first published in the National Vulnerability Database on April 29, 2026, with the most recent update on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-41940 actively exploited?

Yes. CISA added CVE-2026-41940 to the Known Exploited Vulnerabilities catalog on April 30, 2026, affecting WebPros cPanel & WHM and WP2 (WordPress Squared). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2026-41940?

CVE-2026-41940 has a CVSS v3 base score of 9.8 (NVD).

Which products are affected by CVE-2026-41940?

CVE-2026-41940 affects WebPros cPanel & WHM and WP2 (WordPress Squared). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2026-41940?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41940, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-41940

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CVE-2026-41940

📅 Published

🔄 Last Modified

📋 Advisory Details (8)

Known Exploited Vulnerabilities Catalog | CISA

GitHub - watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py · GitHub

Critrical cPanel flaw mass-exploited in "Sorry" ransomware attacks

The Internet Is Falling Down, Falling Down, Falling Down (cPanel & WHM Authentication Bypass CVE-2026-41940)

WebPros cPanel and WHM Authentication Bypass via Login Flow | Advisories | VulnCheck

Namecheap Status - Namecheap Status

WP Squared Changelog - WP2

Release Notes | cPanel & WHM Documentation

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-41940?

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Published

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Advisory Details (8)

Frequently asked(6)

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