CVE-2026-44884

Description

Portainer missing authorization on custom template file endpoint, which exposes template content

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-44884 on 2026-07-28. Shown when MITRE's text differs from the cvelistV5 mirror.

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.

Overview

State

—

Assigner (CNA)

—

CVSS severity

critical

CVSS score

9.1 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Effective score

9.1 / 10 CRITICAL source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

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Source

https://www.tenable.com/cve/CVE-2026-44884

Linked Threat

CVE-2026-44884 — CVE-2026-44884

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-33058

Assigner

GitHub_M

Published

May 28, 2026, 8:58:36 PM

Updated

May 29, 2026, 1:55:35 PM

EUVD base score (CVSS 4.0)

6.0 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EUVD-reported EPSS

0.2600

Vendors

portainer

Products

portainer (2.33.0, < 2.33.8)

portainer (2.39.0, < 2.39.1)

Aliases

GHSA-cqpq-2fgr-8mvc

ENISA 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.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (4)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://github.com/portainer/portainer/security/advisories/GHSA-cqpq-2fgr-8mvc tenable:github.com
• https://www.first.org/epss/ tenable:www.first.org
• https://nvd.nist.gov/vuln/detail/CVE-2026-44884 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-44884 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Windows Kerberos RC4 deprecation: what will break in Active ... - 4sysops
  web:4sysops.com

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  2026-05-26 02:55 UTC
• Security Advisory Bulletin 064 | Ubiquiti Community
  web:community.ui.com

  Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

  2026-05-26 02:55 UTC
• CISA Warns of Exploited Microsoft Defender 0-Day Flaws
  web:cyberpress.org

  The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

  2026-05-26 02:55 UTC
• Adobe Commerce 2.4.6 Security Patch Release Notes | Adobe Commerce
  web:experienceleague.adobe.com

  Learn about security bug fixes, security enhancements, and other security related updates included in the security patch releases for Adobe Commerce version 2.4.6.

  2026-05-26 02:55 UTC
• Security Advisories and Bulletins | Microsoft Learn
  web:learn.microsoft.com

  Learning path Learn how Microsoft supports secure software development as part of a cybersecurity solution - Training Secure software development means integrating security into each phase of your development lifecycle, from requirements analysis to maintenance. Microsoft provides many services that can help you develop more secure code and deploy a more secure application in the cloud. This ...

  2026-05-26 02:55 UTC
• About the security content of iOS 26.4 and iPadOS 26.4
  web:support.apple.com

  This document describes the security content of iOS 26.4 and iPadOS 26.4.

  2026-05-26 02:55 UTC
• Fortinet warns of critical RCE flaws in FortiSandbox and FortiAuthenticator
  web:www.bleepingcomputer.com

  Fortinet has released security patches for two critical vulnerabilities in FortiSandbox and FortiAuthenticator that could enable attackers to run commands or arbitrary code.

  2026-05-26 02:55 UTC
• A guide to vulnerability remediation vs mitigation | @Bugcrowd
  web:www.bugcrowd.com

  Vulnerability mitigation is typically considered a temporary or interim solution. While mitigation measures can reduce the immediate risk associated with vulnerabilities, they may not provide a permanent fix . Organizations should aim to prioritize and plan for complete vulnerability remediation whenever feasible and allocate resources accordingly.

  2026-05-26 02:55 UTC
• Critical Patches Issued for Microsoft Products, April 14, 2026
  web:www.cisecurity.org

  <p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

  2026-05-26 02:55 UTC
• Oracle Critical Patch Update Advisory - April 2026
  web:www.oracle.com

  This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

  2026-05-26 02:55 UTC

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