Vulnerability · Published Jun 10, 2026 · Assigned by GitHub_M

CVE-2026-50566Fission: Environment Runtime.Container and Builder.Container SecurityContext bypass allows privileged pod creation

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 22% 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 78.3% 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, 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/fission/fission	1.24.0	GHSA-m63v-2g9w-2w6v
Go	github.com/fission/fission	1.24.0	GO-2026-5857

Affected products (as reported)

Vendor	Product	Versions
fission	fission	< 1.24.0

Weakness: CWE-250, CWE-269 · 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-m63v-2g9w-2w6v 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