CVE-2026-44881— Portainer 信息泄露漏洞

Portainer: Arbitrary File Read via Git Symlink Injection in Stack Auto-Update

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 supports deploying stacks from Git repositories. When a Git-backed stack is created or updated, Portainer clones the repository using go-git v5, which translates Git blob entries with mode 0o120000 (symlink) into real OS symlinks on the host filesystem via os.Symlink. The only entry blocked from becoming a symlink is .gitmodules; every other path is created as a symlink without validation. Portainer's GET /api/stacks/{id}/file endpoint then reads the stack entry point with os.ReadFile, which follows OS symlinks transparently. A repository containing docker-compose.yml as a symlink to an arbitrary filesystem path causes the symlink target's contents to be returned verbatim in the HTTP response. Any authenticated user with rights to create or update a Git-backed stack — the default configuration in Portainer CE — can read arbitrary files accessible to the Portainer process. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0.

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在文件访问前对链接解析不恰当(链接跟随)

Portainer 信息泄露漏洞

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 Community Edition 2.33.0版本至2.33.8之前版本、2.39.2之前版本和2.41.0之前版本存在信息泄露漏洞，该漏洞源于Git仓库栈创建或更新时，go-git v5将模式为0o120000的Git blob条目转换为真实OS符号链接，且仅阻止.gitmodules条目，导致GET /api/stacks/{id}/file端点可读取任意文件系统路径

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