CVE-2026-23960
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 4.0
- 7.3 HIGHCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.36% probability · 29th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- argoproj/argo workflows
- Source
- security-advisories@github.com
References
- https://github.com/argoproj/argo-workflows/blob/9872c296d29dcc5e9c78493054961ede9fc30797/server/artifacts/artifact_server.go#L194-L244Product
- https://github.com/argoproj/argo-workflows/commit/159a5c56285ecd4d3bb0a67aeef4507779a44e17Patch
- https://github.com/argoproj/argo-workflows/releases/tag/v3.6.17Product, Release Notes
- https://github.com/argoproj/argo-workflows/releases/tag/v3.7.8Product, Release Notes
- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-cv78-6m8q-ph82Exploit, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-23960
- https://bugzilla.redhat.com/show_bug.cgi?id=2431881
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23960.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.