{"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","slug":"CVE-2026-77459","body":"## Overview\n\nArgo 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-77459)\n\nAffected packages:\n\n- `github.com/argoproj/argo-cd/v2 >= 2.10.0, <= 2.14.21`\n- `github.com/argoproj/argo-cd/v3 >= 3.0.0, < 3.3.15`\n- `github.com/argoproj/argo-cd/v3 >= 3.4.0, < 3.4.10`\n- `github.com/argoproj/argo-cd/v3 >= 3.5.0, < 3.5.4`\n- `github.com/argoproj/argo-cd/v3 >= 3.6.0-rc1, < 3.6.0-rc2`\n\nPatched in:\n\n- `github.com/argoproj/argo-cd/v3 3.3.15`\n- `github.com/argoproj/argo-cd/v3 3.4.10`\n- `github.com/argoproj/argo-cd/v3 3.5.4`\n- `github.com/argoproj/argo-cd/v3 3.6.0-rc2`\n\nSource: https://github.com/advisories/GHSA-fmxq-cgp8-87wp\n\n## Vendor advisories\n\n- **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)\n- **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)\n- **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)","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":54.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}