CVE-2025-1974

CVE-2025-1974 — IngressNightmare ingress-nginx 引言 本文档介绍了影响 Kubernetes 组件 ingress-nginx （验证准入控制器）的漏洞 CVE-2025-1974 的研究。 CVE-2025-1974 是一个严重漏洞（CVSS 3.1 9.8 ），属于 ingress-nginx 进程上下文中的未经身份验证的 远程代码执行（RCE） 。攻击者在攻击过程中，如果能够访问 Pod 网络（或者能够将 AdmissionReview 发送到验证 webhook），则可以在控制器 Pod 中执行任意代码，这可能导致 Secrets...

CVE-2021-25735

CVE-2021-25735 利用CVE-2021-25735：绕过Kubernetes验证准入Webhook 设置脆弱环境 让我们先运行脚本gencerts.sh生成TLS证书和密钥。 bash gencerts.sh 要部署准入控制器，你需要本地构建Docker容器镜像，打标签，并使用以下命令将镜像推送到你的Dockerhub。 docker login docker build -t validationwebhook:1.0 . docker tag validationwebhook:1.0 darryk/dev:1.0 docker push darryk/dev:1.0...

externalip-webhook

externalip-webhook 为解决 CVE-2020-8554 而创建 注意： 此 chart 在 Kubernetes 1.21 版本中已弃用，自 1.22 版本起不再支持。要缓解 CVE-2020-8554，请在集群上启用 DenyServiceExternalIPs 准入控制器。 externalip-webhook 是一个验证 webhook，用于阻止服务使用随机外部 IP。集群管理员可以通过指定 allowed-external-ip-cidrs 参数来配置允许用作外部 IP 的 CIDR 列表。Webhook 将仅允许创建不需要外部 IP 或其外部 IP...

CVE-2026-55636

Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6, charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC c...

EUVD-2026-78670

Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6, charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC c...

CVE-2026-55636 Capsule: Incomplete fix of CVE-2026-30963: singular/plural typo leaves namespaces/finalize unprotected

Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6, charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC c...

CVE-2026-55636

Capsule (a multi-tenancy and policy-based framework for Kubernetes) versions 0.13.0 through 0.13.6 contain a singular/plural typo in charts/capsule/templates/configuration.yaml: the validating webhook rule specifies namespace/finalize instead of namespaces/finalize. Because Kubernetes webhook rul...

CVE-2026-55636: Incorrect Authorization

Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6, charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC c...

GO-2024-2428 vulnerabilities

Vulnerabilities for packages: ingress-nginx-controller...

SUSE CVE-2026-30963

Capsule is a multi-tenancy and policy-based framework for Kubernetes. To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and...

GHSA-GC3J-79F2-7VVW Fission: Cross-namespace event leakage via KubernetesWatchTrigger allows persistent tenant surveillance

Summary A low-privilege developer who could create a KubernetesWatchTrigger KWT in their own namespace was able to establish a persistent surveillance channel over any other namespace. Details Two independent flaws compounded: 1. pkg/kubewatcher/kubewatcher.go::createKubernetesWatch used...

Capsule: Incomplete fix of CVE-2026-30963: singular/plural typo leaves namespaces/finalize unprotected

Summary Capsule v0.13.2 webhook rules contain namespace/finalize singular instead of namespaces/finalize plural. K8s requires plural. The finalize defense from CVE-2026-30963 fix is absent. Details PUT to /api/v1/namespaces//finalize has resource=namespaces plural. The singular rule never matches...

CVE-2026-30963

Capsule is a multi-tenancy and policy-based framework for Kubernetes. To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and...

CVE-2026-30963

Capsule (a Kubernetes multi-tenancy framework) relied on a webhook to validate namespace updates, but prior to v0.13.0 it did not intercept namespace/status or namespace/finalize subresource changes. This omission enables a tenant with permission to modify those subresources to hijack other names...

CVE-2026-30963 Capsule Namespace Hijacking via subresource

Capsule is a multi-tenancy and policy-based framework for Kubernetes. To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and...

CVE-2026-30963 Capsule Namespace Hijacking via subresource

Capsule is a multi-tenancy and policy-based framework for Kubernetes. To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and...

EUVD-2026-33739

Capsule is a multi-tenancy and policy-based framework for Kubernetes. To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and...

GHSA-2WW6-HF35-MFJM Capsule Namespace Hijacking via subresource

Summary To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and namespace/status subresource APIs can also modify various fields of a...

Capsule Namespace Hijacking via subresource

Summary To defend against namespace hijacking achieved through update/patch operations on namespaces, Capsule uses a webhook to validate update requests targeting namespaces. However, in Kubernetes, the namespace/finalize and namespace/status subresource APIs can also modify various fields of a...

PT-2026-44722

Name of the Vulnerable Software and Affected Versions Capsule versions prior to 0.13.0 Description Capsule uses a webhook to validate update requests targeting namespaces to prevent namespace hijacking. However, the webhook fails to define interception rules for the 'namespace/finalize' and...