CVE-2026-50567— Fission 路径遍历漏洞

Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.25.0, Unarchive in pkg/utils/zip.go joined each archive entry name with the destination directory via filepath.Join and wrote the result without checking whether the resolved path stayed under the destination. A zip entry named ../../tmp/evil therefore landed at /tmp/evil. An attacker who could control a Package.Spec.Source.URL or Deployment.URL archive could induce the fetcher (running as the per-environment pod's fission-fetcher sidecar) to write files anywhere that process could reach: into other tenants' /packages/<ns>/ directories, into mounted secret/config volumes, or into the fetcher's own binary. This issue has been patched in version 1.25.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

对路径名的限制不恰当(路径遍历)

Fission 路径遍历漏洞

Fission是Fission开源的一个基于Kubernetes的函数部署框架。 Fission 1.25.0之前版本存在路径遍历漏洞，该漏洞源于Unarchive函数使用filepath.Join连接归档条目名称与目标目录后未检查解析路径是否在目标目录下，攻击者可通过控制Package.Spec.Source.URL或Deployment.URL归档诱导fetcher写入任意位置。

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