CVE-2026-50569 Details
Description
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.
A vulnerability in Fission's HTTPTrigger validation process allows for improper input validation of URL-related fields. In versions prior to 1.25.0, the HTTPTrigger validation function overlooked crucial fields such as RelativeURL and Prefix, which were only validated at the command-line interface (CLI) level. This oversight enabled triggers to be created via 'kubectl apply' or direct Kubernetes REST API calls without proper URL checks. As a result, triggers could be configured with empty URLs, invalid prefixes, or relative URLs that traversed directories, potentially colliding with reserved router paths or internal function prefixes.
Users can upgrade to Fission version 1.25.0, where this vulnerability has been addressed. Instructions for upgrading are available in the Fission documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 10, 2026CISA-ADP
Assessed Jun 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/fission/fission/pull/3464 | [email protected] | Source CodeVendor |
| https://github.com/fission/fission/releases/tag/v1.25.0 | [email protected] | Release NotesVendor |
| https://github.com/fission/fission/security/advisories/GHSA-vchh-r53j-8mpw | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Fission | <= 1.24.0 (semver) |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 10, 2026 | New CVE Received | [email protected] |