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CVE Record

CVE-2026-23960: Argo Workflows affected by stored XSS in the artifact directory listing

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.6.17 and 3.7.8, stored XSS in the artifact directory listing allows any workflow author to execute arbitrary JavaScript in another user’s browser under the Argo Server origin, enabling API actions with the victim’s privileges. Versions 3.6.17 and 3.7.8 fix the issue.

HighCVSS 7.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Argo Workflows versions before 3.6.17 and 3.7.8 can let a workflow author plant JavaScript that runs when another user views an artifact directory listing. That code runs as the Argo Server site and may perform API actions using the viewer’s privileges.

Executive priority

Prioritize patching within the normal high-severity remediation window, faster for shared or multi-tenant Argo deployments. This is not confirmed exploited in the provided evidence, but the privilege impact can be material.

Technical view

CVE-2026-23960 is stored XSS in Argo Workflows artifact directory listing, classified as CWE-79. The affected ranges are <3.6.17 and >=3.7.0,<3.7.8. CVSS 4.0 is 7.3 high, with low privileges required and user interaction required.

Likely exposure

Kubernetes environments running Argo Workflows with Argo Server and artifact browsing are the likely exposure point. Risk is higher where many users can author workflows and higher-privileged users browse workflow artifacts.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires a workflow author role and another user viewing the affected artifact listing. Successful abuse could trigger Argo API actions as that user.

Researcher notes

The key security boundary is browser execution under the Argo Server origin. The advisory indicates API actions may occur with victim privileges. Do not assume broader Kubernetes compromise without environment evidence and Argo authorization context.

Mitigation direction

  • Upgrade Argo Workflows to 3.6.17 or 3.7.8.
  • Restrict workflow author permissions until all clusters are patched.
  • Limit Argo Server access to trusted users and networks during remediation.
  • Review vendor and Red Hat guidance for environment-specific impact.
  • Audit recent artifact browsing by privileged Argo users if exposure existed.

Validation and detection

  • Inventory Argo Workflows versions across all Kubernetes clusters.
  • Identify Argo Server instances exposing artifact directory listings.
  • Confirm whether versions fall below 3.6.17 or between 3.7.0 and 3.7.7.
  • Review workflow author roles and who can create artifacts.
  • Confirm upgraded deployments report 3.6.17, 3.7.8, or later fixed releases.
Prepared
Confidence
high
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-23960 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.3 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
9Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.3CVSS 4.0HighCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——GitHub_M
7.1CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H1.25.9redhat-SADP

Vulnerability scoring details

Base CVSS 4.0 score

7.3High
CVSS 4.0 vector shape for CVE-2026-23960Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPargo-workflows: Argo Workflows: Privilege escalation and information disclosure via stored Cross-Site Scripting (XSS)
other:Red Hat severity ratingcvssV3_1
  • 2026-01-21T23:01:15.692Z: Reported to Red Hat.
  • 2026-01-21T22:02:50.491Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
argoprojargo-workflows< 3.6.17, >= 3.7.0, < 3.7.8Listed
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.