Vulnerability · Published Jun 10, 2026 · Assigned by GitHub_M

CVE-2026-50545Fission Environment CRD PodSpec Injection Leading to Node Escape and Cluster Takeover

Critical 9.9

In plain English

A critical-severity privilege mismanagement in fission from fission. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.3%top 77.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/fission/fission	1.24.0	GHSA-wmgg-3p4h-48x7
Go	github.com/fission/fission	1.24.0	GO-2026-5860

Affected products (as reported)

Vendor	Product	Versions
fission	fission	< 1.24.0

Weakness: CWE-269, CWE-284, CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/fission/fission/security/advisories/GHSA-wmgg-3p4h-48x7 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