What’s Vulnerable › Vulnerabilities

CVE-2026-45738: Argo CD: Stored XSS in application link annotations enables developer-to-admin privilege escalation

• Severity: high (CVSS 8.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-79

Description

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Prior to 3.2.12, 3.3.10, and 3.4.2, Argo CD users with application write access can set link.argocd.argoproj.io/* annotations whose pipe-separated values are rendered by ui/src/app/applications/components/application-summary/application-summary.tsx in the Summary tab URLs section as anchor href values without URL validation, allowing javascript: execution in a higher-privileged user's authenticated Argo CD origin session. This issue is fixed in versions 3.2.12, 3.3.10, and 3.4.2.

Affected products

• argoproj argo-cd: before 3.2.12; from 3.3.0 before 3.3.10; from 3.4.0 before 3.4.2 — fixed in 3.2.12, 3.3.10, 3.4.2

How to fix

Upgrade to a fixed version: argoproj argo-cd 3.2.12, 3.3.10, 3.4.2. Check the vendor advisory for mitigations.

References

• https://github.com/argoproj/argo-cd/commit/00f83c41dcfd879f34f8e0248c860d704b41cf0f
• https://github.com/argoproj/argo-cd/commit/35ea43c537d6e8948e67f347317fc4f88b325122
• https://github.com/argoproj/argo-cd/commit/c8df5ff7acc403adcee1256da5d87081cd52f0a6
• https://github.com/argoproj/argo-cd/releases/tag/v3.2.12
• https://github.com/argoproj/argo-cd/releases/tag/v3.3.10
• https://github.com/argoproj/argo-cd/releases/tag/v3.4.2
• https://github.com/argoproj/argo-cd/security/advisories/GHSA-h98r-wv3h-fr38
• https://github.com/argoproj/argo-cd/security/advisories/GHSA-h98r-wv3h-fr38

Get alerted when CVE-2026-45738 or the next vulnerability affects your stack