CVE-2026-47680— Source Controller 路径遍历漏洞
一分钟漏洞结论
影响对象
fluxcd source-controller
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
source-controller 是一个 Kubernetes 控制器（Operator），专门用于从外部源（如 Git、OCI、Helm 仓库和兼容 S3 的对象存储桶）获取制品（artifacts）。在 0.0.17 到 1.8.4 版本中，任何能够影响由 资源引用的桶内容的能力拥有者，都可以诱使 source-controller 将获取到的对象数据写入到每次协调（reconciliation）工作目录之外的路径。 该漏洞的影响范围受限于 source-controller 自身及下游 Flux 控制器的摘
可能的 ATT&CK 技术 1 AI
T1083 · File and Directory Discovery
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一、 漏洞 CVE-2026-47680 基础信息
漏洞信息
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Vulnerability Title
Source controller: Improper path handling allows traversal
来源: CVE Program / CVE List V5
Vulnerability Description
The source-controller is a Kubernetes operator, specialised in artifacts acquisition from external sources such as Git, OCI, Helm repositories and S3-compatible buckets. In versions 0.0.17 through 1.8.4, an actor with the ability to influence the contents of a bucket referenced by a `Bucket` resource can cause source-controller to write fetched object data to paths outside the per-reconciliation working directory. The corruption surface is bounded by source-controller's own and downstream Flux controllers' digest verification: source-controller verifies stored artifact digests during reconciliation and rebuilds on divergence; consumers (kustomize-controller, helm-controller) verify the digest of fetched artifacts and reject mismatches. These checks prevent a manipulated artifact from reaching the cluster, but an attacker can still write files anywhere the source-controller pod has permission to write. Separately, a user with permission to create or update `GitRepository` resources can cause source-controller to test for the existence of paths outside the cloned repository. Because the result is exposed via the resource's status, this allows limited enumeration of file paths on the controller pod. This surface exists only on source-controller v1.6.0 and later, where the sparse-checkout feature was introduced. This vulnerability was fixed in source-controller v1.8.5. There is no in-product workaround. Users should upgrade to a patched version. As a defense-in-depth measure for the GitRepository sparse-checkout surface, a `ValidatingAdmissionPolicy` (or a third-party policy engine such as Kyverno or OPA Gatekeeper) can be deployed to reject `GitRepository` resources whose `.spec.sparseCheckout` entries contain `..` or absolute path segments.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| fluxcd | source-controller | >= 0.0.17, < 1.8.5 | - |
|
二、漏洞 CVE-2026-47680 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-47680 补丁与修复 (2)
CVE-2026-47680 厂商安全公告 (1)
IV. Related Vulnerabilities
Same product: source-controller
V. Comments for CVE-2026-47680
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