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CVE-2026-44883— Portainer: JWT accepted in URL query leaks tokens to logs and referers

Quick assessment

Affected
portainer portainer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Portainer是Portainer开源的一款用于管理Docker环境和Docker主机的轻量级用户管理界面。 Portainer 2.33.0版本至2.33.8之前版本、2.39.2之前版本和2.41.0之前版本存在安全漏洞，该漏洞源于认证中间件接受URL查询参数中的JWT令牌，导致令牌可能被记录在日志或Referer标头中泄露。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.46% · P37

Possible ATT&CK Techniques 1 AI

T1552.003 · Shell History

Affected Version Matrix 3

VendorProduct Version RangeStatus
portainer portainer >= 2.33.0, < 2.33.8 affected
>= 2.39.0, < 2.39.2 affected
>= 2.40.0, < 2.41.0 affected
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I. Basic Information for CVE-2026-44883

Vulnerability Information
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Vulnerability Title
Portainer: JWT accepted in URL query leaks tokens to logs and referers
Source: CVE Program / CVE List V5
Vulnerability 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, 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过GET请求中的查询字符串导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Portainer 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Portainer是Portainer开源的一款用于管理Docker环境和Docker主机的轻量级用户管理界面。 Portainer 2.33.0版本至2.33.8之前版本、2.39.2之前版本和2.41.0之前版本存在安全漏洞，该漏洞源于认证中间件接受URL查询参数中的JWT令牌，导致令牌可能被记录在日志或Referer标头中泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
portainer portainer >= 2.33.0, < 2.33.8 -

II. Public POCs for CVE-2026-44883

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III. Intelligence Information for CVE-2026-44883

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Vendor Advisories for CVE-2026-44883 (1)

Same Patch Batch · portainer · 2026-05-28 · 9 CVEs total

CVE-2026-44850 8.5 HIGH Portainer: Bind-mount restriction bypass via HostConfig.Mounts
CVE-2026-44882 8.1 HIGH Portainer: Kubernetes middleware continues after token validation failure, bypassing endpo
CVE-2026-44885 5.5 MEDIUM Portainer: Path traversal in backup archive extraction allows arbitrary file write
CVE-2026-33590 Insecure default permissions in Portainer CE
CVE-2026-44881 Portainer: Arbitrary File Read via Git Symlink Injection in Stack Auto-Update
CVE-2026-44884 Portainer: Missing authorization on custom template file endpoint exposes template content
CVE-2026-44848 Portainer: Missing authorization on Docker plugin endpoints allows host RCE
CVE-2026-44849 Portainer: Endpoint security bypass via Swarm service create/update

IV. Related Vulnerabilities

Same product: portainer
Same vendor: portainer
Same weakness: CWE-598

V. Comments for CVE-2026-44883

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