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CVE-2026-50564— Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape

CVSS 9.9 · Critical EPSS 0.27% · P19

Affected Version Matrix 1

VendorProductVersion RangeStatus
fissionfission< 1.24.0affected
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I. Basic Information for CVE-2026-50564

Vulnerability Information
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Vulnerability Title
Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape
Source: NVD (National Vulnerability Database)
Vulnerability Description
Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.24.0, Fission's Environment CRD exposes spec.runtime.podSpec and spec.builder.podSpec, which are merged into the Kubernetes pod specs for runtime and builder pods. The merge logic propagated hostNetwork, hostPID, hostIPC, container privileged, and serviceAccountName from the user-supplied podspec with no filtering, and Environment.Validate performed no security-relevant checks on these fields. This issue has been patched in version 1.24.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权管理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Fission 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fission是Fission开源的一个基于Kubernetes的函数部署框架。 Fission 1.24.0之前版本存在安全漏洞，该漏洞源于Environment CRD暴露的spec.runtime.podSpec和spec.builder.podSpec在合并时未过滤hostNetwork、hostPID、hostIPC、容器特权模式和serviceAccountName等字段，且Environment.Validate未进行安全相关检查。
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

VendorProductAffected VersionsCPESubscribe
fissionfission < 1.24.0 -

II. Public POCs for CVE-2026-50564

#POC DescriptionSource LinkShenlong Link
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Qwen3.6-35B-A3B · 8138 chars
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III. Intelligence Information for CVE-2026-50564

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Patches & Fixes for CVE-2026-50564 (1)

Vendor Advisories for CVE-2026-50564 (1)

Vendor Pages for CVE-2026-50564 (1)

Same Patch Batch · fission · 2026-06-10 · 17 CVEs total

CVE-2026-505639.9 CRITICALFission Container Executor Function PodSpec Injection Leading to Node Escape
CVE-2026-505669.9 CRITICALFission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows
CVE-2026-505459.9 CRITICALFission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
CVE-2026-466149.8 CRITICALFission router exposes /fission-function/<ns>/<name> on its public listener, allowing invo
CVE-2026-466128.8 HIGHFission StorageSvc /v1/archive endpoint exposes unauthenticated CRUD over all function arc
CVE-2026-498248.5 HIGHFission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function
CVE-2026-505708.5 HIGHFission: Incomplete capability denylist in Environment/Function PodSpec validation allows
CVE-2026-498237.7 HIGHFission: Cross-namespace Package read via unvalidated PackageRef in Function admission web
CVE-2026-498227.7 HIGHFission: Cross-namespace event leakage via KubernetesWatchTrigger allows persistent tenant
CVE-2026-498217.7 HIGHFission: Cross-namespace Environment reference in Package allows build-time command execut
CVE-2026-505677.7 HIGHFission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destin
CVE-2026-505654.9 MEDIUMFission builder pods auto-mount the fission-builder ServiceAccount token in the user-suppl
CVE-2026-505694.3 MEDIUMFission: HTTPTrigger admission omits RelativeURL / Prefix validation; kubectl apply bypass
CVE-2026-505683.6 LOWFission: SanitizeFilePath lexical HasPrefix bypass permits sibling-directory escape
CVE-2026-46617Fission runtime pods automount the fission-fetcher service-account token into the user fun
CVE-2026-46618Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command,

IV. Related Vulnerabilities

Same product: fission
Same vendor: fission
Same weakness: CWE-269

V. Comments for CVE-2026-50564

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