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CVE-2026-93991— Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector

Quick assessment

Affected
argoproj argo-workflows
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Argo Workflows 4.1.0 至 4.1.3 版本中的 函数存在一个授权绕过漏洞：当元数据的 字段选择器使用“不等于”（NotEquals）运算符时，未应用集群范围的访问审查。拥有命名空间范围 list 权限的攻击者可以利用取反的命名空间字段选择器，检索所有其他命名空间中的已归档工作流，从而暴露工作流的 spec 参数、参数值以及注释（annotations）。

CVSS 7.7 · High

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services
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I. Basic Information for CVE-2026-93991

Vulnerability Information
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Vulnerability Title
Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
argoproj argo-workflows 4.1.0 ~ 4.1.4 -

II. Public POCs for CVE-2026-93991

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III. Intelligence Information for CVE-2026-93991

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Patches & Fixes for CVE-2026-93991 (1)

Vendor Advisories for CVE-2026-93991 (2)

Proof of Concept for CVE-2026-93991 (1)

Vendor Pages for CVE-2026-93991 (1)

IV. Related Vulnerabilities

Same product: argo-workflows
Same vendor: argoproj
Same weakness: CWE-639

V. Comments for CVE-2026-93991

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