CVE-2026-44884
Last modified
CVE-2026-44884 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8 and 2.39.1, a missing authorization vulnerability in the Custom Template file endpoint (GET /api/custom_templates/{id}/file) allows any authenticated user to read the file content of any custom template by enumerating sequential integer IDs, bypassing Resource Control access restrictions. EPSS estimates a 0.26% chance of exploitation in the next 30 days.
Description
Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8 and 2.39.1, a missing authorization vulnerability in the Custom Template file endpoint (GET /api/custom_templates/{id}/file) allows any authenticated user to read the file content of any custom template by enumerating sequential integer IDs, bypassing Resource Control access restrictions. Template files may contain environment-specific values such as connection strings, API tokens, or registry credentials that administrators would not expect standard users to read. This vulnerability is fixed in 2.33.8 and 2.39.1.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Portainer | Portainer | >= 2.33.0, < 2.33.8 |
| Portainer | Portainer | >= 2.39.0, < 2.39.1 |
References
- https://github.com/portainer/portainer/security/advisories/GHSA-cqpq-2fgr-8mvcExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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