GHSA-gx55-f84r-v3r7: github.com/fission/fission (CVE-2026-50564)

Package	Ecosystem	Affected	Fixed in
github.com/fission/fission	Go	<1.24.0	1.24.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Fission (Go module github.com/fission/fission) versions before 1.24.0 are affected. A user with permission to create or update Environment resources can set pod spec fields that allow host networking, host PID, privileged containers, and similar settings in the Fission function or builder namespace. From there, an attacker can escape to the underlying node and potentially take over the cluster. Upgrade to version 1.24.0 or later, which rejects these fields at admission and strips them when merging pod specs.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.9	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0027, the 19th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 15:06 UTC First seen by agentprime
31 Oct 2026, 15:06 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.