GHSA-wmgg-3p4h-48x7: github.com/fission/fission (CVE-2026-50545)

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 versions before 1.24.0 let a user who can create or update Environment resources inject dangerous pod settings, such as host namespaces, hostPath volumes and privileged containers, which the executor copies into generated pods. An attacker with that RBAC access could escape to the node and, by reading the cluster CA key, take over the cluster. Upgrade to Fission 1.24.0, which validates these fields, extends the webhook to update requests and strips the unsafe settings during pod spec merging.

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 0.0030, the 22nd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 15:05 UTC First seen by agentprime
31 Oct 2026, 15:05 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.