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CVE-2026-46617— Fission runtime pods automount the fission-fetcher service-account token into the user function container, granting function code namespace-wide secret / configmap read

Quick assessment

Affected
fission fission
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fission是Fission开源的一个基于Kubernetes的函数部署框架。 Fission 1.23.0之前版本存在安全漏洞，该漏洞源于运行时Pod使用fission-fetcher ServiceAccount并自动挂载令牌，用户函数代码可读取命名空间中任何密钥或配置映射。

AI Predicted 8.1 Difficulty: Easy EPSS 0.48% · P40

Affected Version Matrix 1

VendorProduct Version RangeStatus
fission fission < 1.23.0 affected
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I. Basic Information for CVE-2026-46617

Vulnerability Information
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Vulnerability Title
Fission runtime pods automount the fission-fetcher service-account token into the user function container, granting function code namespace-wide secret / configmap read
Source: CVE Program / CVE List V5
Vulnerability Description
Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, Fission runtime pods were created with ServiceAccountName: fission-fetcher, and the fission-fetcher ServiceAccount was granted namespace-wide get on secrets and configmaps (it needs that to load function code, env vars, and config). The runtime pod's automounted token was reachable from inside the user's function container at /var/run/secrets/kubernetes.io/serviceaccount/token, so user-supplied function code inherited the same Kubernetes API privileges and could read any secret or configmap in the function's namespace — far beyond the Function.spec.secrets allowlist that the function specification suggests. This issue has been patched in version 1.23.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
带着不必要的权限执行
Source: CVE Program / CVE List V5
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 1.23.0之前版本存在安全漏洞，该漏洞源于运行时Pod使用fission-fetcher ServiceAccount并自动挂载令牌，用户函数代码可读取命名空间中任何密钥或配置映射。
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

Vendor Product Affected Versions CPE Subscribe
fission fission < 1.23.0 -

II. Public POCs for CVE-2026-46617

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III. Intelligence Information for CVE-2026-46617

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Patches & Fixes for CVE-2026-46617 (1)

Vendor Advisories for CVE-2026-46617 (1)

Vendor Pages for CVE-2026-46617 (1)

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

CVE-2026-50563 9.9 CRITICAL Fission Container Executor Function PodSpec Injection Leading to Node Escape
CVE-2026-50566 9.9 CRITICAL Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows
CVE-2026-50545 9.9 CRITICAL Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
CVE-2026-50564 9.9 CRITICAL Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, n
CVE-2026-46614 9.8 CRITICAL Fission router exposes /fission-function/<ns>/<name> on its public listener, allowing invo
CVE-2026-46612 8.8 HIGH Fission StorageSvc /v1/archive endpoint exposes unauthenticated CRUD over all function arc
CVE-2026-49824 8.5 HIGH Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function
CVE-2026-50570 8.5 HIGH Fission: Incomplete capability denylist in Environment/Function PodSpec validation allows
CVE-2026-49823 7.7 HIGH Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission web
CVE-2026-49822 7.7 HIGH Fission: Cross-namespace event leakage via KubernetesWatchTrigger allows persistent tenant
CVE-2026-49821 7.7 HIGH Fission: Cross-namespace Environment reference in Package allows build-time command execut
CVE-2026-50567 7.7 HIGH Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destin
CVE-2026-50565 4.9 MEDIUM Fission builder pods auto-mount the fission-builder ServiceAccount token in the user-suppl
CVE-2026-50569 4.3 MEDIUM Fission: HTTPTrigger admission omits RelativeURL / Prefix validation; kubectl apply bypass
CVE-2026-50568 3.6 LOW Fission: SanitizeFilePath lexical HasPrefix bypass permits sibling-directory escape
CVE-2026-46618 Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command,

IV. Related Vulnerabilities

Same product: fission
Same vendor: fission
Same weakness: CWE-250

V. Comments for CVE-2026-46617

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