TI-2026-32758 Aliases CVE-2026-44883 GHSA-jvp4-q659-95mj

Portainer: JWT accepted in URL query leaks tokens to logs and referers

HIGH 69CWE-598Published 2026-05-28 · Updated 2026-06-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: High
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00291 21st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed portainer (portainer): 2.33.8, 2.39.2, 2.41.0github.com/portainer/portainer (Go): 2.33.8, 2.39.2, 2.41.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
portainer	portainer	2.33.0 to before 2.33.8; 2.39.0 to before 2.39.2; 2.40.0 to before 2.41.0	2.33.8, 2.39.2, 2.41.0	Patch available	CNA
—	github.com/portainer/portainer (Go)	2.33.0 to before 2.33.8	2.33.8	Patch available	GHSA-jvp4-q659-95mj
—	github.com/portainer/portainer (Go)	2.39.0 to before 2.39.2	2.39.2	Patch available	GHSA-jvp4-q659-95mj
—	github.com/portainer/portainer (Go)	2.40.0 to before 2.41.0	2.41.0	Patch available	GHSA-jvp4-q659-95mj

portainer Vendorportainer Affected 2.33.0 to before 2.33.8; 2.39.0 to before 2.39.2; 2.40.0 to before 2.41.0 Fixed in 2.33.8, 2.39.2, 2.41.0 Patch available CNA
github.com/portainer/portainer (Go) Vendor— Affected 2.33.0 to before 2.33.8 Fixed in 2.33.8 Patch available GHSA-jvp4-q659-95mj
github.com/portainer/portainer (Go) Vendor— Affected 2.39.0 to before 2.39.2 Fixed in 2.39.2 Patch available GHSA-jvp4-q659-95mj
github.com/portainer/portainer (Go) Vendor— Affected 2.40.0 to before 2.41.0 Fixed in 2.41.0 Patch available GHSA-jvp4-q659-95mj

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:portainer:portainer:::::community:::*	2.33.0 to before 2.33.8; 2.34.0 to before 2.39.2; 2.40.0 to before 2.41.0	Vulnerable	portainer

cpe:2.3:a:portainer:portainer:*:*:*:*:community:*:*:* Versions 2.33.0 to before 2.33.8; 2.34.0 to before 2.39.2; 2.40.0 to before 2.41.0 Vulnerable ·portainer

Remediation

Fix · CNA portainer (portainer) Fixed in 2.33.8, 2.39.2, 2.41.0
Fix · GHSA-jvp4-q659-95mj github.com/portainer/portainer (Go) Fixed in 2.33.8 Advisory →
Fix · GHSA-jvp4-q659-95mj github.com/portainer/portainer (Go) Fixed in 2.39.2 Advisory →
Fix · GHSA-jvp4-q659-95mj github.com/portainer/portainer (Go) Fixed in 2.41.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-44883
2026-10-03 Alias added: GHSA-jvp4-q659-95mj

References

Exploit 1

https://github.com/portainer/portainer/security/advisories/GHSA-jvp4-q659-95mj

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-44883

Other 4

TI-2026-32726 Portainer: Missing authorization on Docker plugin endpoints allows host RCE CVSS 4.0CRITICAL 9.4
TI-2026-32727 Portainer: Endpoint security bypass via Swarm service create/update CVSS 4.0CRITICAL 9.4
TI-2020-14859 Portainer 1.24.1 and earlier is affected by incorrect access control that may lead to… CVSS 3.1CRITICAL 9.8
TI-2024-22245 Portainer before 2.20.0 allows redirects when the target is not index.yaml. CVSS 3.1CRITICAL 9.1
TI-2018-13786 A vulnerability was found in Portainer before 1.20.0. CVSS 3.0CRITICAL 9.8
TI-2018-09100 Portainer before 1.18.0 supports unauthenticated requests to the websocket endpoint with… CVSS 3.0CRITICAL 9.8

See all 25 →

Sources

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