portainer Community Edition up to 2.33.7/2.39.1/2.40.x get request method with sensitive query strings

Summaryinfo

A vulnerability described as problematic has been identified in portainer Community Edition up to 2.33.7/2.39.1/2.40.x. This impacts an unknown function. The manipulation results in use of get request method with sensitive query strings. This vulnerability is cataloged as CVE-2026-44883. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in portainer Community Edition up to 2.33.7/2.39.1/2.40.x. It has been classified as problematic. Affected is an unknown code block. The manipulation with an unknown input leads to a use of get request method with sensitive query strings vulnerability. CWE is classifying the issue as CWE-598. The web application uses the HTTP GET method to process a request and includes sensitive information in the query string of that request. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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, 2.39.2, and 2.41.0, Portainer's authentication middleware accepts JWT bearer tokens passed as the ?token=<JWT> URL query parameter on any authenticated API endpoint, in addition to the standard Authorization: Bearer header. URLs are recorded in reverse-proxy access logs, browser history, and HTTP Referer headers on outbound navigation, so any JWT passed this way can be harvested by anyone with access to those logs or by an external site the user subsequently visits. A leaked token grants the full privileges of the user it was issued to, until the token expires (default 8 hours, configurable). The ?token= parameter was used by Portainer's browser-based container attach, exec, and pod shell features, so any user with exec or attach rights on a container was exposed — not only administrators. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-44883 since 05/07/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. Additional levels of successful authentication are needed for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 2.33.8, 2.39.2 or 2.41.0 eliminates this vulnerability.

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Productinfo

Vendor

• portainer

Name

• Community Edition

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.33.0
• 2.33.1
• 2.33.2
• 2.33.3
• 2.33.4
• 2.33.5
• 2.33.6
• 2.33.7
• 2.34
• 2.35
• 2.36
• 2.37
• 2.38
• 2.39
• 2.39.0
• 2.39.1
• 2.40

CPE 2.3info

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CPE 2.2info

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Entryinfo

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