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CVE-2026-65643· NVD / CVE Program· CNA hackerone

Eval injection in cPanel 11.138.0.0 and earlier allows remote authenticated users to execute arbitrary code as root.

HighCVSS 8.7 · v4.0—Proof of concept Fix available
Published
Aug 31, 2026
Updated
Sep 17, 2026
EPSS
0.9% · 58th percentile
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Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · hackerone
8.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
cpanelcpanel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cpanel cpanelbefore 110.0.141
  • cpanel cpanel112.0.0 and later · before 134.0.53
  • cpanel cpanel136.0.0 and later · before 136.0.37
  • cpanel cpanel138.0.0 and later · before 138.0.2
  • cpanel cpanel138.1.0 and later · before 138.1.7

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.

  • WebPros cPanel

    • before 11.110.0.141affected · semver
    • 11.112.0.0 and later · before 11.134.0.53affected · semver
    • 11.136.0.0 and later · before 11.136.0.37affected · semver
    • 11.138.0.0 and later · before 11.138.0.2affected · semver
    • 11.138.1.0 and later · before 11.138.1.7affected · semver

Same product

cpanel: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-41940WebPros cPanel and WHM Authentication Bypass via Login FlowKEV
    97Now
  • CVE-2004-1769The "Allow cPanel users to reset their password via email" feature in cPanel 9.1.0 build 34 and earlier, including 8.x, allows remote attack
    50Plan
  • CVE-2023-29489An issue was discovered in cPanel before 11.109.9999.116.
    44Plan
  • CVE-2004-1770The login page for cPanel 9.1.0, and possibly other versions, allows remote attackers to execute arbitrary code via shell metacharacters in
    43Plan
  • CVE-2003-1425guestbook.cgi in cPanel 5.0 allows remote attackers to execute arbitrary commands via the template parameter.
    43Plan
  • CVE-2020-26108cPanel before 88.0.13 mishandles file-extension dispatching, leading to code execution (SEC-488).
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
WebPros cPanel11.110.0.141Vendor (CNA)
WebPros cPanel11.134.0.53Vendor (CNA)
WebPros cPanel11.136.0.37Vendor (CNA)
WebPros cPanel11.138.0.2Vendor (CNA)
WebPros cPanel11.138.1.7Vendor (CNA)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-08-28
Proof-of-concept repository on GitHubstars:132026-09-03

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-4 d
  2. Published
  3. TodayOct 8, 2026+37 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-41940124 days apartWebPros cPanel and WHM Authentication Bypass via Login FlowKEV
    97Now

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-95 · Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records