TI-2026-37291 Aliases CVE-2026-50569 GHSA-vchh-r53j-8mpw

Fission: HTTPTrigger admission omits RelativeURL / Prefix validation; kubectl apply bypasses CLI checks

LOW 19CWE-20Published 2026-06-10 · Updated 2026-06-10

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00228 13th percentileScored 2026-11-07

Fix Fixed fission (fission): 1.25.0github.com/fission/fission (Go): 1.25.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
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 1.25.0	1.25.0	Patch available	CNA
—	github.com/fission/fission (Go)	before 1.25.0	1.25.0	Patch available	GHSA-vchh-r53j-8mpw

fission Vendorfission Affected before 1.25.0 Fixed in 1.25.0 Patch available CNA
github.com/fission/fission (Go) Vendor— Affected before 1.25.0 Fixed in 1.25.0 Patch available GHSA-vchh-r53j-8mpw

Remediation

Fix · CNA fission (fission) Fixed in 1.25.0
Fix · GHSA-vchh-r53j-8mpw github.com/fission/fission (Go) Fixed in 1.25.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-50569
2026-10-03 Alias added: GHSA-vchh-r53j-8mpw

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-50569

Other 5

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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences