CVE-2026-93991
High · CVSS 8.3Published 2026-09-19
CVSS
8.3
High
EPSS
—
exploit probability
Active Exploit
No
not yet listed
What is CVE-2026-93991?
Argo Workflows versions 4.1.0 through 4.1.3 contain an authorization bypass vulnerability in ListArchivedWorkflows that fails to apply cluster-scoped access review when the metadata.namespace field selector uses the NotEquals operator. Attackers with namespace-scoped list permissions can use a negated namespace field selector to retrieve archived workflows from all other namespaces, exposing spec arguments, parameter values, and annotations.
CVSS Score Explained
CVSS 8.3 is High severity. Exploitation is likely straightforward and the impact is significant — data loss, privilege escalation, or remote code execution are common outcomes. Patch as soon as possible.
EPSS Exploitation Probability
No EPSS score yet — model needs more data on this CVE.
References & Patches
- ›https://github.com/argoproj/argo-workflows
- ›https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9
- PATCHhttps://github.com/argoproj/argo-workflows/releases/tag/v4.1.4
- ›https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4
- ›https://www.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector
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