CVE-2026-54526
Argo Workflows: Incomplete fix for CVE-2026-31892: ArtifactGC.PodSpecPatch bypass of Strict/Secure templateReferencing
Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverrides and SanitizeUserWorkflowSpec walk only the top-level fields of WorkflowSpec via reflection, and WorkflowSpec.ArtifactGC is allow-listed wholesale; the struct behind that field, WorkflowLevelArtifactGC, has a PodSpecPatch sub-field whose contents flow unmodified into util.ApplyPodSpecPatch on the artifact-GC pod, the same sink the original fix closed for WorkflowSpec.PodSpecPatch, so a user submitting a Workflow under templateReferencing: Strict or Secure (against a referenced WorkflowTemplate that declares an output artifact and setting spec.artifactGC.strategy: OnWorkflowCompletion) can still inject an arbitrary strategic merge patch into the artifact-GC pod, including hostPath volumes, privileged: true, arbitrary image and command, and hostNetwork: true, defeating the stated purpose of Strict/Secure reference mode. This issue is fixed in versions 3.7.15 and 4.0.6.
INFO
Published Date :
July 16, 2026, 7:16 p.m.
Last Modified :
Oct. 24, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Argo Workflows to version 3.7.15.
- Update Argo Workflows to version 4.0.6.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-54526.
| URL | Resource |
|---|---|
| https://github.com/argoproj/argo-workflows/commit/277e9cef0ad16d7eaaab253573d0695951a65dbd | Patch |
| https://github.com/argoproj/argo-workflows/commit/358cc3968c8f06f1be0967e41df191088db0b662 | Patch |
| https://github.com/argoproj/argo-workflows/releases/tag/v3.7.15 | Product Release Notes |
| https://github.com/argoproj/argo-workflows/releases/tag/v4.0.6 | Product Release Notes |
| https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm | Exploit Vendor Advisory |
| https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-54526 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-54526
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-54526 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-54526 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: argo-workflows de argoproj, Description: Argo Workflows es un motor de flujo de trabajo nativo de contenedores de código abierto para orquestar trabajos paralelos en Kubernetes. Antes de las versiones 3.7.15 y 4.0.6, la corrección de la lista de permitidos para CVE-2026-31892 es incompleta porque workflow/util/merge.go ValidateUserOverrides y SanitizeUserWorkflowSpec recorren solo los campos de nivel superior de WorkflowSpec a través de reflexión, y WorkflowSpec.ArtifactGC está en la lista de permitidos en su totalidad; la estructura detrás de ese campo, WorkflowLevelArtifactGC, tiene un subcampo PodSpecPatch cuyos contenidos fluyen sin modificar a util.ApplyPodSpecPatch en el pod de recolección de elementos (artifact-GC pod), el mismo sumidero que la corrección original cerró para WorkflowSpec.PodSpecPatch, por lo que un usuario que envía un flujo de trabajo bajo templateReferencing: Strict o Secure (contra un WorkflowTemplate referenciado que declara un artefacto de salida y establece spec.artifactGC.strategy: OnWorkflowCompletion) aún puede inyectar un parche de fusión estratégico arbitrario en el pod de recolección de elementos (artifact-GC pod), incluyendo volúmenes hostPath, privileged: true, imagen y comando arbitrarios, y hostNetwork: true, frustrando el propósito declarado del modo de referencia Strict/Secure. Este problema está solucionado en las versiones 3.7.15 y 4.0.6. -
Initial Analysis by [email protected]
Jul. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:* versions up to (excluding) 3.7.15 *cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:* versions from (including) 4.0.0 up to (excluding) 4.0.6 Added Reference Type GitHub, Inc.: https://github.com/argoproj/argo-workflows/commit/277e9cef0ad16d7eaaab253573d0695951a65dbd Types: Patch Added Reference Type GitHub, Inc.: https://github.com/argoproj/argo-workflows/commit/358cc3968c8f06f1be0967e41df191088db0b662 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/argoproj/argo-workflows/releases/tag/v3.7.15 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/argoproj/argo-workflows/releases/tag/v4.0.6 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 17, 2026
Action Type Old Value New Value Added Reference https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm Added SSVC {'id': 'CVE-2026-54526', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-17T13:57:39.248649Z'} -
New CVE Received by [email protected]
Jul. 16, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'argoproj', 'product': 'argo-workflows', 'versions': [{'status': 'affected', 'version': '< 3.7.15'}, {'status': 'affected', 'version': '>= 4.0.0, < 4.0.6'}]}] Added Description Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 3.7.15 and 4.0.6, the allow-list fix for CVE-2026-31892 is incomplete because workflow/util/merge.go ValidateUserOverrides and SanitizeUserWorkflowSpec walk only the top-level fields of WorkflowSpec via reflection, and WorkflowSpec.ArtifactGC is allow-listed wholesale; the struct behind that field, WorkflowLevelArtifactGC, has a PodSpecPatch sub-field whose contents flow unmodified into util.ApplyPodSpecPatch on the artifact-GC pod, the same sink the original fix closed for WorkflowSpec.PodSpecPatch, so a user submitting a Workflow under templateReferencing: Strict or Secure (against a referenced WorkflowTemplate that declares an output artifact and setting spec.artifactGC.strategy: OnWorkflowCompletion) can still inject an arbitrary strategic merge patch into the artifact-GC pod, including hostPath volumes, privileged: true, arbitrary image and command, and hostNetwork: true, defeating the stated purpose of Strict/Secure reference mode. This issue is fixed in versions 3.7.15 and 4.0.6. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-284 Added Reference https://github.com/argoproj/argo-workflows/commit/277e9cef0ad16d7eaaab253573d0695951a65dbd Added Reference https://github.com/argoproj/argo-workflows/commit/358cc3968c8f06f1be0967e41df191088db0b662 Added Reference https://github.com/argoproj/argo-workflows/releases/tag/v3.7.15 Added Reference https://github.com/argoproj/argo-workflows/releases/tag/v4.0.6 Added Reference https://github.com/argoproj/argo-workflows/security/advisories/GHSA-48p8-g2fx-3wwm