CVE-2026-93991CWE-639

CVE-2026-93991

High · published September 20, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
36.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
EPSS
0.00436 · 36.8th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-09-20T03:17Z
References (5)
https://github.com/argoproj/argo-workflows · [email protected]https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9 · [email protected]https://github.com/argoproj/argo-workflows/releases/tag/v4.1.4 · [email protected]https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4 · [email protected]https://www.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector · [email protected]
EPSS history
Timeline
  • 21 SEP 03:37Z
    EPSS moved — → 0%
    epss
  • 19 SEP 22:58Z
    Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector
    cvelistv5