TI-2026-34274 Aliases CVE-2026-46618 GHSA-7pjr-qpvh-m339

Improper privilege management in fission

LOW 36CWE-250Published 2026-06-10 · Updated 2026-06-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Privilege escalation, Code execution
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-250 and CWE-78.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00364 30th percentileScored 2026-11-07

Fix Fixed fission (fission): 1.23.0github.com/fission/fission (Go): 1.23.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
fission	fission	before 1.23.0	1.23.0	Patch available	CNA
—	github.com/fission/fission (Go)	before 1.23.0	1.23.0	Patch available	GHSA-7pjr-qpvh-m339

fission Vendorfission Affected before 1.23.0 Fixed in 1.23.0 Patch available CNA
github.com/fission/fission (Go) Vendor— Affected before 1.23.0 Fixed in 1.23.0 Patch available GHSA-7pjr-qpvh-m339

Remediation

Fix · CNA fission (fission) Fixed in 1.23.0
Fix · GHSA-7pjr-qpvh-m339 github.com/fission/fission (Go) Fixed in 1.23.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-46618
2026-10-03 Alias added: GHSA-7pjr-qpvh-m339

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-46618

Other 4

TI-2026-34271 Improper access control in fission CVSS 3.1CRITICAL 9.8
TI-2026-34273 Improper privilege management in fission CVSS 4.0HIGH 8.7
TI-2026-37288 Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation CVSS 3.1CRITICAL 9.9
TI-2026-37286 Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape CVSS 3.1CRITICAL 9.9
TI-2026-37285 Fission Container Executor Function PodSpec Injection Leading to Node Escape CVSS 3.1CRITICAL 9.9
TI-2026-37268 Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover CVSS 3.1CRITICAL 9.9

See all 16 →

Sources

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