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17 vulnerabilities by fission
CVE-2026-50570 (GCVE-0-2026-50570)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:34 – Updated: 2026-06-10 18:37
VLAI
Title
Fission: Incomplete capability denylist in Environment/Function PodSpec validation allows tenant-added CAP_SYS_TIME and cross-tenant node wall-clock corruption
Summary
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, Fission added PodSpec safety validation for tenant-facing Environment and Function CRDs (ValidatePodSpecSafety / ValidateContainerSafety admission webhook + sanitizeContainerSecurityContext executor merge layer), but the capability check was implemented as a fixed denylist of six Linux capabilities (SYS_ADMIN, NET_ADMIN, SYS_PTRACE, SYS_MODULE, DAC_READ_SEARCH, DAC_OVERRIDE). The denylist omitted CAP_SYS_TIME, among others. As a result, a tenant who could create a Function or Environment CRD could request securityContext.capabilities.add: ["SYS_TIME"], pass Fission's admission validation and merge-layer sanitization, and run attacker-controlled code with CAP_SYS_TIME in the resulting function or runtime container. This issue has been patched in version 1.25.0.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3465 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.25.0 | x_refsource_MISC |
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CVE-2026-50569 (GCVE-0-2026-50569)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:34 – Updated: 2026-06-10 18:57
VLAI
Title
Fission: HTTPTrigger admission omits RelativeURL / Prefix validation; kubectl apply bypasses CLI checks
Summary
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, HTTPTriggerSpec.Validate() validated Methods, FunctionReference, Host, IngressConfig, and CorsConfig, but silently skipped RelativeURL and Prefix. Those two fields were validated at the CLI level only (pkg/fission-cli/cmd/httptrigger/create.go:83). The post-CRD-modernization webhook for HTTPTrigger was retired in favor of API-server CEL — and CEL had no rules on those fields either — so an HTTPTrigger created via kubectl apply or a direct Kubernetes REST API call bypassed every URL-level check. This issue has been patched in version 1.25.0.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-20 - Improper Input Validation
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3464 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.25.0 | x_refsource_MISC |
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}
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CVE-2026-50568 (GCVE-0-2026-50568)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:31 – Updated: 2026-06-10 17:31
VLAI
Title
Fission: SanitizeFilePath lexical HasPrefix bypass permits sibling-directory escape
Summary
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, SanitizeFilePath in pkg/utils/utils.go validated that a path stayed under a safe directory by calling strings.HasPrefix(path, safedir). This is a lexical check, not a directory boundary check: /packages-extra/evil starts with /packages, so it passed. The function did not enforce a path-separator boundary, so any sibling directory whose name began with the safe-directory string was accepted. Callers included the builder's Clean handler (pkg/builder/builder.go:208) and the fetcher's Fetch / Upload handlers (pkg/fetcher/fetcher.go). A tenant who could pre-create or control a sibling directory under the fetcher / builder's shared volume could induce a write or read outside the intended safe directory. This issue has been patched in version 1.25.0.
Severity
CWE
- CWE-41 - Improper Resolution of Path Equivalence
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3445 | x_refsource_MISC |
| https://github.com/fission/fission/pull/3446 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.25.0 | x_refsource_MISC |
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CVE-2026-50567 (GCVE-0-2026-50567)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:30 – Updated: 2026-06-10 17:30
VLAI
Title
Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory
Summary
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.
Severity
7.7 (High)
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3444 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.25.0 | x_refsource_MISC |
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}
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"metrics": [
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"discovery": "UNKNOWN"
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"title": "Fission: Zip Slip in pkg/utils/zip.go:Unarchive allows fetcher to write outside the destination directory"
}
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"datePublished": "2026-06-10T17:30:45.695Z",
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}
CVE-2026-50566 (GCVE-0-2026-50566)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:29 – Updated: 2026-06-10 18:20
VLAI
Title
Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation
Summary
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, a tenant with environments.fission.io create/update RBAC can run privileged / allowPrivilegeEscalation / dangerous-capability containers in the Fission function or builder namespace, scheduled under the executor's high-privilege service account — enabling container-sandbox escape, host filesystem and network access, and potential node- and cluster-level compromise. This issue has been patched in version 1.24.0.
Severity
9.9 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3406 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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},
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}
],
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"timestamp": "2026-06-10T18:20:35.978913Z",
"version": "2.0.3"
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],
"title": "CISA ADP Vulnrichment"
}
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}
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}
},
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CVE-2026-50565 (GCVE-0-2026-50565)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:28 – Updated: 2026-06-10 18:42
VLAI
Title
Fission builder pods auto-mount the fission-builder ServiceAccount token in the user-supplied builder container
Summary
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 builder pods were created with ServiceAccountName: fission-builder and no AutomountServiceAccountToken: false, so the kubelet auto-mounted the service-account token into every container in the pod — including the user-supplied builder image. This issue has been patched in version 1.24.0.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3390 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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CVE-2026-50564 (GCVE-0-2026-50564)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:27 – Updated: 2026-06-10 18:47
VLAI
Title
Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape
Summary
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.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3391 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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}
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}
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CVE-2026-50563 (GCVE-0-2026-50563)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:27 – Updated: 2026-06-10 17:27
VLAI
Title
Fission Container Executor Function PodSpec Injection Leading to Node Escape
Summary
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 Container Executor path lets a tenant supply Function.spec.podspec directly; the executor merges it into the executor-built podspec and creates a Deployment whose pods run the user's container image. This issue has been patched in version 1.24.0.
Severity
9.9 (Critical)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3391 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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"affected": [
{
"product": "fission",
"vendor": "fission",
"versions": [
{
"status": "affected",
"version": "\u003c 1.24.0"
}
]
}
],
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"lang": "en",
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}
],
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.9,
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CVE-2026-50545 (GCVE-0-2026-50545)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:26 – Updated: 2026-06-10 17:26
VLAI
Title
Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover
Summary
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, the Environment.spec.runtime.podSpec / spec.builder.podSpec passthrough lacked validation, and MergePodSpec propagated dangerous fields into the generated pods. This issue has been patched in version 1.24.0.
Severity
9.9 (Critical)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3390 | x_refsource_MISC |
| https://github.com/fission/fission/pull/3391 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
{
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"cna": {
"affected": [
{
"product": "fission",
"vendor": "fission",
"versions": [
{
"status": "affected",
"version": "\u003c 1.24.0"
}
]
}
],
"descriptions": [
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"value": "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, the Environment.spec.runtime.podSpec / spec.builder.podSpec passthrough lacked validation, and MergePodSpec propagated dangerous fields into the generated pods. This issue has been patched in version 1.24.0."
}
],
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.9,
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],
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"discovery": "UNKNOWN"
},
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}
},
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CVE-2026-49824 (GCVE-0-2026-49824)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:25 – Updated: 2026-06-10 18:21
VLAI
Title
Fission: Cross-namespace Environment reference via unvalidated EnvironmentRef in Function admission webhook
Summary
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, the Fission Function admission webhook (pkg/webhook/function.go) validated that spec.secrets[].namespace and spec.configmaps[].namespace equalled the function's own namespace but performed no equivalent check on spec.environment.namespace. This issue has been patched in version 1.24.0.
Severity
8.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3389 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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CVE-2026-49823 (GCVE-0-2026-49823)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:23 – Updated: 2026-06-10 17:23
VLAI
Title
Fission: Cross-namespace Package read via unvalidated PackageRef in Function admission webhook
Summary
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, a Fission Function spec carries three reference types — Secret, ConfigMap, and Package. The first two were namespace-validated by the admission webhook; PackageRef.Namespace was not. This issue has been patched in version 1.24.0.
Severity
7.7 (High)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3389 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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CVE-2026-49822 (GCVE-0-2026-49822)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:22 – Updated: 2026-06-10 18:43
VLAI
Title
Fission: Cross-namespace event leakage via KubernetesWatchTrigger allows persistent tenant surveillance
Summary
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, 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. This issue has been patched in version 1.24.0.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3379 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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CVE-2026-49821 (GCVE-0-2026-49821)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:21 – Updated: 2026-06-10 18:35
VLAI
Title
Fission: Cross-namespace Environment reference in Package allows build-time command execution and SA token exfiltration
Summary
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 buildermgr controller processed Package CRDs without verifying that Package.spec.environment.namespace matched Package.metadata.namespace. This issue has been patched in version 1.24.0.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3379 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.24.0 | x_refsource_MISC |
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CVE-2026-46618 (GCVE-0-2026-46618)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:20 – Updated: 2026-06-10 17:20
VLAI
Title
Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command, allowing the builder pod to invoke arbitrary executables
Summary
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, before the round-1 security sweep, pkg/builder/builder.go passed Environment.spec.builder.command directly into exec.Command(...) after a strings.Fields split, with no validation of the executable path or its arguments. A user who could create or update Environment CRDs in a namespace observed by the buildermgr could thereby point the builder pod at any executable inside the builder image (e.g. /bin/sh -c '...') and execute arbitrary code in the builder pod context. This issue has been patched in version 1.23.0.
Severity
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3364 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.23.0 | x_refsource_MISC |
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}
],
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"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 6.9,
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"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
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"vulnIntegrityImpact": "LOW"
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"cweId": "CWE-78",
"description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
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"type": "CWE"
}
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"description": "CWE-250: Execution with Unnecessary Privileges",
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"type": "CWE"
}
]
},
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"description": "CWE-269: Improper Privilege Management",
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}
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"discovery": "UNKNOWN"
},
"title": "Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command, allowing the builder pod to invoke arbitrary executables"
}
},
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CVE-2026-46617 (GCVE-0-2026-46617)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:20 – Updated: 2026-06-10 18:20
VLAI
Title
Fission runtime pods automount the fission-fetcher service-account token into the user function container, granting function code namespace-wide secret / configmap read
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3366 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.23.0 | x_refsource_MISC |
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}
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CVE-2026-46612 (GCVE-0-2026-46612)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:19 – Updated: 2026-06-10 18:30
VLAI
Title
Fission StorageSvc /v1/archive endpoint exposes unauthenticated CRUD over all function archives
Summary
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, the Fission storagesvc component registers archive CRUD handlers (/v1/archive GET / POST / DELETE and /v1/archives list) directly on its HTTP router without performing any authentication or authorization. Any caller able to reach the storagesvc ClusterIP — including any other workload in the same Kubernetes cluster — could enumerate archive IDs, download archives belonging to other tenants, upload arbitrary archive content, and delete archives. This issue has been patched in version 1.23.0.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3365 | x_refsource_MISC |
| https://github.com/fission/fission/pull/3368 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.23.0 | x_refsource_MISC |
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CVE-2026-46614 (GCVE-0-2026-46614)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:19 – Updated: 2026-06-10 18:44
VLAI
Title
Fission router exposes /fission-function/<ns>/<name> on its public listener, allowing invocation of any function without an HTTPTrigger
Summary
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, the Fission router registers an internal-style route — /fission-function/<name> and /fission-function/<ns>/<name> — for every Function object, independent of whether any HTTPTrigger exists for that function. The route was mounted on the same listener as user-defined HTTPTriggers (svc/router, port 8888), so any caller who could reach the router could invoke any function by guessing its metadata.name (and namespace), bypassing the host / path / method / method-allow-list restrictions encoded in HTTPTrigger objects. This issue has been patched in version 1.23.0.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/fission/fission/security/advis… | x_refsource_CONFIRM |
| https://github.com/fission/fission/pull/3365 | x_refsource_MISC |
| https://github.com/fission/fission/pull/3369 | x_refsource_MISC |
| https://github.com/fission/fission/releases/tag/v1.23.0 | x_refsource_MISC |
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