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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-55761 Detail

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. In versions 2.39.0 through 2.39.3 and 2.40.0 until 2.43.0, unauthenticated restore and administrator initialization endpoints (/api/restore and /api/users/admin/init) remain accessible during the five-minute setup window for uninitialized instances, allowing a network attacker to restore a crafted backup or create the first administrator account and gain full administrative access. This issue is fixed in versions 2.39.4 and 2.43.0.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-B 7.1 HIGH
Vector:  CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/portainer/portainer/commit/49f19107cf9a3540cbe406c9eb7f24390e1af02b GitHub, Inc.
https://github.com/portainer/portainer/commit/d2b56efcb4e43c4168bb6688eee9f6bf22867312 GitHub, Inc.
https://github.com/portainer/portainer/issues/2770 GitHub, Inc.
https://github.com/portainer/portainer/releases/tag/2.39.4 GitHub, Inc.
https://github.com/portainer/portainer/releases/tag/2.43.0 GitHub, Inc.
https://github.com/portainer/portainer/security/advisories/GHSA-x626-fcwx-f5pc GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-287 Improper Authentication GitHub, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-55761
NVD Published Date:
07/08/2026
NVD Last Modified:
07/08/2026
Source:
GitHub, Inc.