critical CVSS 9.9

CVE-2026-29789·PHP vulnerability

Vito is a self-hosted web application that helps manage servers and deploy PHP applications into production servers. Prior to version 3.20.3, a missing authorization check in workflow site-creation actions allows an authenticated attacker with workflow write access in one project to create/manage sites on servers belonging to other projects by supplying a foreign server_id. This issue has been patched in version 3.20.3.

Severity
critical
Software
PHP
Fixed in
3.20.3
Published
2026-03-06

Affected versions

Until: 3.20.3

Fixed in: 3.20.3

How to fix this CVE

Update Vito to version 3.20.3 or later to remediate a critical authorization bypass that allows authenticated users with workflow write permissions to manipulate sites across unrelated projects. This patch adds proper authorization checks to workflow site-creation actions, preventing cross-project resource access. Immediate patching is strongly recommended due to the critical CVSS score of 9.9.

sudo dnf update php

Defensia detects this vulnerability

WAF mitigation (if patching is not yet possible)

Add this rule to your WAF to block exploitation attempts while you schedule the patch. 

Implement WAF rules to restrict cross-project server_id parameters in workflow API endpoints: block requests where the server_id does not correspond to the authenticated user's current project context. Rate-limit workflow site-creation endpoints to slow reconnaissance.

How to check if you are affected

  1. Run `php -v` to check the installed PHP version and confirm Vito installation status
  2. Check the Vito application directory for version information: `grep -r '3.20' /path/to/vito/composer.lock | head -5`
  3. Search application logs for workflow site-creation requests with mismatched project and server_id parameters: `grep -i 'server_id' /var/log/vito/*.log | grep -v 'project_id'`
  4. Verify the patch by checking the git commit hash: `cd /path/to/vito && git log --oneline | grep -i 'authorization\|3.20.3'`

FAQ

What is CVE-2026-29789?

CVE-2026-29789 is a critical authorization bypass vulnerability in Vito's workflow site-creation feature that allows an authenticated attacker with workflow write access to create and manage websites on servers belonging to different projects by injecting a foreign server_id parameter.

Is CVE-2026-29789 being actively exploited?

No, there are no confirmed reports of active exploitation in the wild, and no public exploits are currently available. However, the critical severity warrants immediate patching.

What versions of Vito and PHP are affected by CVE-2026-29789?

All Vito versions prior to 3.20.3 are affected. The vulnerability exists in the Vito application layer, which runs on PHP; ensure both Vito and PHP are up-to-date.

How do I check if my server is vulnerable to CVE-2026-29789?

Run `grep -r 'version' /path/to/vito/composer.lock | grep vito` to check your Vito version. If it is below 3.20.3, your installation is vulnerable.

Does Defensia detect CVE-2026-29789?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Vito and PHP are present on a monitored server, CVE-2026-29789 will appear in your dashboard with remediation steps and patch guidance.

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References

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