How severe is CVE-2026-29203?

CVE-2026-29203 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-29203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-29203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-29203 have an EU (EUVD) identifier?

Yes. CVE-2026-29203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28812.

When was CVE-2026-29203 published?

CVE-2026-29203 was published on 2026-05-08 and last updated on 2026-06-17.

CVE-2026-29203

CVE-2026-29203 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-61.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 5.3
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28812
Weakness: CWE-61
Published: 2026-05-08
Last modified: 2026-06-17

Description

A chmod call in the cPanel Nova plugin's Cpanel::Nova::Connector follows symlinks, allowing setting root permissions on arbitrary system files or directories. That can cause DoS or local privilege escalation when an authenticated cPanel user places a symlink at a user-controlled legacy Nova path under their home directory.

Frequently asked questions

What is CVE-2026-29203?: A chmod call in the cPanel Nova plugin's Cpanel::Nova::Connector follows symlinks, allowing setting root permissions on arbitrary system files or directories. That can cause DoS or local privilege escalation when an authenticated cPanel user places a symlink at a user-controlled legacy Nova path under their home directory.
How severe is CVE-2026-29203?: CVE-2026-29203 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-29203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-29203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-29203 have an EU (EUVD) identifier?: Yes. CVE-2026-29203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28812.
When was CVE-2026-29203 published?: CVE-2026-29203 was published on 2026-05-08 and last updated on 2026-06-17.

References

https://support.cpanel.net/hc/en-us/articles/40311543760407-Security-CVE-2026-29203-cPanel-WHM-WP2-Security-Update-May-08-2026

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