Vulnerability · Published Jun 10, 2026 · Assigned by GitHub_M

CVE-2026-50564Fission Environment CRD podspec passthrough enables hostPID/hostNetwork/privileged pods, node escape

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 20% 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 80.1% 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, Fission's Environment CRD exposes spec.runtime.podSpec and spec.builder.podSpec, which are merged into the Kubernetes pod specs for runtime and builder pods. The merge logic propagated hostNetwork, hostPID, hostIPC, container privileged, and serviceAccountName from the user-supplied podspec with no filtering, and Environment.Validate performed no security-relevant checks on these fields. 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-gx55-f84r-v3r7
Go	github.com/fission/fission	1.24.0	GO-2026-5855

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-gx55-f84r-v3r7 x_refsource_CONFIRM
https://github.com/fission/fission/pull/3391 x_refsource_MISC
https://github.com/fission/fission/releases/tag/v1.24.0 x_refsource_MISC