{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.10.0"
              },
              {
                "last_affected": "2.14.21"
              },
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.3.15"
              },
              {
                "introduced": "3.4.0"
              },
              {
                "fixed": "3.4.10"
              },
              {
                "introduced": "3.5.0"
              },
              {
                "fixed": "3.5.4"
              },
              {
                "introduced": "3.6.0-rc1"
              },
              {
                "fixed": "3.6.0-rc2"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "2175939ed6156ddd743e60f427f7f48118c971bf"
            },
            {
              "last_affected": "206a6eeca509bbf7f239301f3d3fa498c23251a4"
            },
            {
              "introduced": "e98f483bfd5781df2592fef1aeed1148f150d9c9"
            },
            {
              "fixed": "a7d718da2e77e6fe9e3d58cd788b5cdaa6b215fe"
            },
            {
              "introduced": "f082e49f6cea81ac91b620216cbe90311cafa2d4"
            },
            {
              "fixed": "58c8bc04d3f14568d817cd9e3a525f313c295c01"
            },
            {
              "introduced": "e95e1be88a2da6c06bff5c2fe1791e4d233ed810"
            },
            {
              "fixed": "d6d5b248ce00e1a2c512068002a93d3319767087"
            },
            {
              "introduced": "b7e3f52c2827c5c9e0dd41d71b292bbeb66010be"
            },
            {
              "fixed": "f922b44b5d17765910e31a583dfb253d75afebe6"
            }
          ],
          "repo": "https://github.com/argoproj/argo-cd",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-fmxq-cgp8-87wp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77459.json"
  },
  "details": "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.",
  "id": "CVE-2026-77459",
  "modified": "2026-10-14T10:31:02.389533924Z",
  "published": "2026-10-13T16:26:47.088Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77459.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/argoproj/argo-cd/commit/1149cdc6e932208c4402183cc3d7b7485239940c"
    },
    {
      "type": "FIX",
      "url": "https://github.com/argoproj/argo-cd/commit/4bc8085b0a6d2296b849539d3d09fc7be7a4a511"
    },
    {
      "type": "FIX",
      "url": "https://github.com/argoproj/argo-cd/commit/7f0a05834b05103d69d7c150e1ee36541b314696"
    },
    {
      "type": "FIX",
      "url": "https://github.com/argoproj/argo-cd/commit/d5dd7019ee65be8895133fe4df554e28074242c4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/argoproj/argo-cd/releases/tag/v3.3.15"
    },
    {
      "type": "WEB",
      "url": "https://github.com/argoproj/argo-cd/releases/tag/v3.4.10"
    },
    {
      "type": "WEB",
      "url": "https://github.com/argoproj/argo-cd/releases/tag/v3.5.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/argoproj/argo-cd/releases/tag/v3.6.0-rc2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/argoproj/argo-cd/security/advisories/GHSA-fmxq-cgp8-87wp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77459"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Argo CD: AppProject destination-namespace and resource restrictions bypassed by PreDelete/PostDelete resource hooks"
}