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Fencer Vulns
critical 9.9

CVE-2026-31892 json

WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode

published 2026-03-11 7 mo ago modified 2026-09-29 41 d ago also BIT-argo-workflows-2026-31892 , EUVD-2026-11206 , GHSA-3wf5-g532-rcrr , GO-2026-4681

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From 2.9.0 to before 4.0.2 and 3.7.11, A user who can submit Workflows can completely bypass all security settings defined in a WorkflowTemplate by including a podSpecPatch field in their Workflow submission. This works even when the controller is configured with templateReferencing: Strict, which is specifically documented as a mechanism to restrict users to admin-approved templates. The podSpecPatch field on a submitted Workflow takes precedence over the referenced WorkflowTemplate during spec merging and is applied directly to the pod spec at creation time with no security validation. This vulnerability is fixed in 4.0.2 and 3.7.11.

Patch / fix

  • go github.com/argoproj/argo-workflows/v4 4.0.2
  • go github.com/argoproj/argo-workflows/v3 3.7.11
  • bitnami argo-workflows 3.7.11, 4.0.2
  • Red Hat Red Hat OpenShift AI 2.25 1776740351, 1776740366, 1776740379, 1776740386, 1776740558, 1776740640, 1776740726
  • govulncheck-vulndb openSUSE Leap 15.6 0.0.20260317T205859-150000.1.152.1

suse advisories SUSE-SU-2026:1042-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-31892 updated cvss 8.5

github.com/argoproj/argo-workflows: Argo Workflows: Security bypass allows privilege escalation via podSpecPatch field

  • Red Hat OpenShift AI 2.25 rhoai 1776740351, rhoai 1776740366, rhoai 1776740379, rhoai 1776740386, rhoai 1776740558, rhoai 1776740640, +1 more
    fixed: vendor fix RHSA-2026:10184
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-ml-pipelines-driver-rhel8, rhoai/odh-ml-pipelines-launcher-rhel8, rhoai/odh-ml-pipelines-api-server-v2-rhel8, rhoai/odh-ml-pipelines-persistenceagent-v2-rhel8, rhoai/odh-ml-pipelines-scheduledworkflow-v2-rhel8 Red Hat OpenShift AI 2.25 rhoai 1775144403, rhoai 1776243157, rhoai 1776243163, rhoai 1776243192, rhoai 1776243217, rhoai 1776243229, +64 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
7 mo ago

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/argoproj/argo-workflows/security/advisories/GHSA-3wf5-g532-rcrr referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.9 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H
CISA ADP 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA 4.0 8.9 CVSS:4.0/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
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
OSV 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/argoproj/argo-workflows/v4
<4.0.2
4.0.2
go github.com/argoproj/argo-workflows/v3
<3.7.11
3.7.11
go github.com/argoproj/argo-workflows
>=2.9.0
all versions
 no fix listed
bitnami argo-workflows
<3.7.11
>=4.0.0, <4.0.2
3.7.11
4.0.2
go github.com/argoproj/argo-workflows/v2
>=2.9.0
 no fix listed

Affected products

  • argoproj argo-workflows
  • Red Hat Red Hat OpenShift AI 2.25
  • Red Hat Red Hat OpenShift AI (RHOAI)

Classification

Weakness
  • CWE-863 Incorrect Authorization
  • CWE-807 Reliance on Untrusted Inputs in a Security Decision

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.