CVE-2026-44884

MediumCVSS 6.5

Published: 28/05/2026(UTC)Updated: 21/07/2026(UTC)Translated: 22/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.26%

17th percentile - higher than 17% of all known CVEs

Summary

In Portainer Community Edition from version 2.33.0 to before 2.33.8 and 2.39.1, a missing authorization vulnerability in the GET /api/custom_templates/{id}/file endpoint allows any authenticated user to read custom template files by enumerating sequential IDs. These files may contain sensitive data such as connection strings, API tokens, or registry credentials.

Risk Assessment

The risk involves unauthorized access to sensitive configuration data of containerized environments, potentially leading to credential leakage and compromise of the entire infrastructure.

Recommendation

Immediately update Portainer Community Edition to version 2.33.8 or 2.39.1, which contain the fix for this vulnerability.

Other vulnerabilities in Portainer Community Edition

CVE-2026-55761Medium
A vulnerability in Portainer Community Edition allows an unauthenticated attacker to access restore and administrator initialization endpoints within five minutes of starting an uninitialized instance. The attacker can restore a crafted backup or create the first administrator account, gaining full administrative access.

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS