Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks

Date Oct 15, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product Go ยท github.com/argoproj/argo-cd/v2
CVE CVE-2026-77459
High-risk advisory CVE-2026-77459

Summary

Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks

Why it matters

GitHub has published a reviewed security advisory for github.com/argoproj/argo-cd/v2. Prioritize it with other application dependency updates, especially because EPSS places it in the 53% percentile.

Operator check

Check whether github.com/argoproj/argo-cd/v2 is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.7%; percentile: 53%.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.