Argo CD is Vulnerable to Unauthenticated Remote DoS via malformed Azure DevOps git.push webhook

{
  "id": "ca752854b15b5fba4cde211b195010fd3eb338cfc1ca6227cbf720020a3dc575",
  "url": "https://osv.dev/vulnerability/CVE-2025-59538",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Argo CD is Vulnerable to Unauthenticated Remote DoS via malformed Azure DevOps git.push webhook",
    "summary": "Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. For versions 2.9.0-rc1 through 2.14.19, 3.0.0-rc1 through 3.2.0-rc1, 3.1.6 and 3.0.17, when the webhook.azuredevops.username and webhook.azuredevops.password are not set in the default configuration, the /api/webhook endpoint crashes the entire argocd-server process when it receives an Azure DevOps Push event whose JSON array resource.refUpdates is empty. The slice index [0] is accessed without a length check, causing an index-out-of-range panic. A single unauthenticated HTTP POST is enough to kill the process. This issue is resolved in versions 2.14.20, 3.2.0-rc2, 3.1.8 and 3.0.19.",
    "evidence": "osv:CVE-2025-59538",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-59538",
      "aliases": [
        "BIT-argo-cd-2025-59538",
        "CVE-2025-59538",
        "GHSA-gpx4-37g2-c8pv",
        "GO-2025-3995"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/argoproj/argo-cd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9cf0c69bbe70393db40e5755e34715f30179ee09"
                },
                {
                  "fixed": "879895af786513ae25ba22f36f861cc1afe3b435"
                },
                {
                  "introduced": "e98f483bfd5781df2592fef1aeed1148f150d9c9"
                },
                {
                  "fixed": "132be88e674fbdb222e38f9a15edb5b512904cd9"
                },
                {
                  "introduced": "03c4ad854c1e6d922a121cd40f505d9bc6e402da"
                },
                {
                  "fixed": "becb020064fe9be5381bf6e5818ff8587ca8f377"
                },
                {
                  "introduced": "06ef059f9fc7cf9da2dfaef2a505ee1e3c693485"
                },
                {
                  "fixed": "1a023f1ca7fe4ec942b4b6696804988d5a632baf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.9.0"
                      },
                      {
                        "fixed": "2.14.20"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "3.0.19"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:argoproj:argo_cd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.1.0"
                      },
                      {
                        "fixed": "3.1.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:argoproj:argo_cd:3.2.0:rc1:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.2.0-rc1"
                      },
                      {
                        "last_affected": "3.2.0-rc1"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1a023f1ca7fe4ec942b4b6696804988d5a632baf"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.2.0-rc1",
            "v3.0.18",
            "v3.1.7",
            "v3.0.17",
            "v3.1.6",
            "v3.1.5",
            "v3.1.4",
            "v3.0.16",
            "v3.0.15",
            "v3.1.3",
            "v3.0.14",
            "v3.1.2",
            "v3.0.13",
            "v3.1.1",
            "v3.1.0",
            "v3.0.12",
            "v3.0.11",
            "v3.0.10",
            "v3.0.9",
            "v3.0.8",
            "v3.0.7",
            "v3.0.6",
            "v3.0.5",
            "v3.0.4",
            "v3.0.3",
            "v3.0.2",
            "v3.0.1",
            "v3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-59538.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.853124332Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59538.json",
        "https://github.com/argoproj/argo-cd/security/advisories/GHSA-gpx4-37g2-c8pv",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-59538",
        "https://github.com/argoproj/argo-cd/commit/1a023f1ca7fe4ec942b4b6696804988d5a632baf"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-248",
          "CWE-703"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59538.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-59538",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503245,
  "published_at": "2025-10-01T21:09:08.87+00:00"
}