Cross-site scripting in Argo CD - CVE-2026-45738
Published: May 18, 2026
Vulnerability identifier: #VU131761
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-45738
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Argo
Affected software:
Argo CD
Argo CD
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary JavaScript in an administrator's session context and escalate privileges.
The vulnerability exists due to cross-site scripting in the application summary URLs section when rendering application link annotations. A remote user can set a crafted link.argocd.argoproj.io/* annotation containing a javascript: URI to execute arbitrary JavaScript in an administrator's session context and escalate privileges.
User interaction is required because a higher-privileged user must click the rendered link in the Summary tab.
How to mitigate CVE-2026-45738
Install security update from vendor's website.