--- id: CVE-2026-77459 title: 'Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes' summary: >- Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From 2.10.0 until 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2, Argo CD creates PostDelete resource hooks without applying the AppProject destination and resource authoriz… severity: critical cvss: 9.9 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H' cwe: - CWE-863 - CWE-653 vendor: argoproj product: argo-cd affected: - 'argo-cd >= 2.10.0, <= 2.14.21' - 'argo-cd >= 3.0.0, < 3.3.15' - 'argo-cd >= 3.4.0, < 3.4.10' - 'argo-cd >= 3.5.0, < 3.5.4' - 'argo-cd >= 3.6.0-rc1, < 3.6.0-rc2' patched: - github.com/argoproj/argo-cd/v3 3.3.15 - github.com/argoproj/argo-cd/v3 3.4.10 - github.com/argoproj/argo-cd/v3 3.5.4 - github.com/argoproj/argo-cd/v3 3.6.0-rc2 published: '2026-10-13' updated: '2026-10-16' sourceUpdated: '2026-10-16T16:00:33.533' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77459' references: - url: >- https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c label: security-advisories@github.com - url: >- https://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511 label: security-advisories@github.com - url: >- https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696 label: security-advisories@github.com - url: >- https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4 label: security-advisories@github.com - url: 'https://github.com/argoproj/argo-cd/releases/tag/v3.3.15' label: security-advisories@github.com - url: 'https://github.com/argoproj/argo-cd/releases/tag/v3.4.10' label: security-advisories@github.com - url: 'https://github.com/argoproj/argo-cd/releases/tag/v3.5.4' label: security-advisories@github.com - url: 'https://github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2' label: security-advisories@github.com - url: >- https://github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp label: security-advisories@github.com - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77459' - url: 'https://github.com/advisories/GHSA-fmxq-cgp8-87wp' - url: 'https://github.com/argoproj/argo-cd' - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-77459.json - url: 'https://access.redhat.com/security/cve/CVE-2026-77459' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2548643' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-77459' - url: 'https://github.com/argoproj/argo-cd/commit/d5dd7019e' - url: 'https://access.redhat.com/errata/RHSA-2026:77273' - url: 'https://access.redhat.com/errata/RHSA-2026:77269' - url: 'https://access.redhat.com/errata/RHSA-2026:77267' tags: - nvd - cve.org - ghsa - go - osv - csaf - vex - red-hat epss: 0.00498 epssPercentile: 0.42452 aliases: - GHSA-fmxq-cgp8-87wp - BIT-argo-cd-2026-77459 - GO-2026-6784 ecosystem: go ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-10-14T15:27:27.557503Z' ingestedAt: '2026-10-13T17:38:53.198Z' --- ## Overview Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. From 2.10.0 until 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2, Argo CD creates PostDelete resource hooks without applying the AppProject destination and resource authorization checks used during ordinary synchronization. The omitted checks include cluster-scoped and namespaced resource allow/deny lists. A user who can write to an Application's Git repository can commit a delete hook targeting a forbidden namespace, server, group, kind, or resource name, and deletion of the Application causes the application-controller to create that resource with its destination-cluster credentials. The reachable impact is bounded by the controller's cluster access but can include cluster-scoped resources, disallowed namespaces, persistent hook objects, and secondary objects created by a hook Job. PreSync, Sync, PostSync, and SyncFail hooks continue to use the normal project checks. This issue is fixed in versions 3.3.15, 3.4.10, 3.5.4, and 3.6.0-rc2. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Package advisory (CVE-2026-77459) Affected packages: - `github.com/argoproj/argo-cd/v2 >= 2.10.0, <= 2.14.21` - `github.com/argoproj/argo-cd/v3 >= 3.0.0, < 3.3.15` - `github.com/argoproj/argo-cd/v3 >= 3.4.0, < 3.4.10` - `github.com/argoproj/argo-cd/v3 >= 3.5.0, < 3.5.4` - `github.com/argoproj/argo-cd/v3 >= 3.6.0-rc1, < 3.6.0-rc2` Patched in: - `github.com/argoproj/argo-cd/v3 3.3.15` - `github.com/argoproj/argo-cd/v3 3.4.10` - `github.com/argoproj/argo-cd/v3 3.5.4` - `github.com/argoproj/argo-cd/v3 3.6.0-rc2` Source: https://github.com/advisories/GHSA-fmxq-cgp8-87wp ## Vendor advisories - **RHSA-2026:77273** · Red Hat · fixed in: Red Hat OpenShift GitOps 1.20 · released 2026-10-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:77273) - **RHSA-2026:77269** · Red Hat · fixed in: Red Hat OpenShift GitOps 1.21 · released 2026-10-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:77269) - **RHSA-2026:77267** · Red Hat · fixed in: Red Hat OpenShift GitOps 1.22 · released 2026-10-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:77267)