CVE-2026-65643: Eval injection in cPanel 11.138.0.0 and earlier allows remote authenticated users to execute arbitrary code as

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HIGH 8.8UPGRADE

CVE-2026-65643 is a high-severity flaw (CVSS 8.8) affecting cpanel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-95
Published	2026-09-01
Last modified	2026-10-14

Publisher (CNA): HackerOne · Vendor: cpanel

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-01 03:16 UTCPublished CVE record published
2026-10-14 04:18 UTCUpdated Record last modified

cpanel cpanel UPGRADE

Affected: < 110.0.141 · >= 112.0.0 and < 134.0.53 · >= 136.0.0 and < 136.0.37 · >= 138.0.0 and < 138.0.2 · >= 138.1.0 and < 138.1.7

Fixed in: 110.0.141, 134.0.53, 136.0.37, 138.0.2, 138.1.7

Safe to downgrade to: a release before 112.0.0

1. Check installed version

apt-cache policy cpanel || rpm -q cpanel || cpanel --version

2. UPGRADE to 110.0.141 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cpanel

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cpanel

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 112.0.0 (Debian / Ubuntu)

apt-cache madison cpanel sudo apt install cpanel=<VERSION_BEFORE_112.0.0> sudo apt-mark hold cpanel

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cpanel sudo dnf downgrade cpanel-<VERSION_BEFORE_112.0.0> sudo dnf versionlock add cpanel

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-65643?

cpanel: upgrade to 110.0.141, 134.0.53, 136.0.37, 138.0.2, 138.1.7. Exact commands for each OS are on this page.

Is CVE-2026-65643 being exploited?

CVE-2026-65643 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-65643 affect?

CVE-2026-65643 affects cpanel. Severity is high (CVSS 8.8). Eval injection in cPanel 11.138.0.0 and earlier allows remote authenticated users to execute arbitrary code as root.

How urgent is CVE-2026-65643?

Priority 45/100. High severity

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References

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