Cross-site scripting in Argo CD - CVE-2026-45738
Published: May 18, 2026
Vulnerability identifier: #VU131761
CSH Severity: Low
CVSS v4: 5.1 [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]
CVE-ID: CVE-2026-45738
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Argo CD
How to mitigate CVE-2026-45738
Install security update from vendor's website.
Argo CD - addressed in versions 3.2.12, 3.3.10, 3.4.2