{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.4.53"
              },
              {
                "introduced": "6.0.0"
              },
              {
                "fixed": "6.4.41"
              },
              {
                "introduced": "7.0.0"
              },
              {
                "fixed": "7.4.13"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.13"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "119cc48b2370db276ed5ab81ef0458943645bcf9"
            },
            {
              "introduced": "6530589fc40cdceda230fb6a69173ce52fa8b5ca"
            },
            {
              "fixed": "1a01cd7a6313d5a375480e0d1d4a0ddf834ae12b"
            },
            {
              "introduced": "f84d7d3c93e6a884908402775199b1f7d55c7be1"
            },
            {
              "fixed": "da3c28025a664e6a88e1af104a74457d99301161"
            },
            {
              "introduced": "bea6dc79db4d95c34b77ec27273d812aa64d65be"
            },
            {
              "fixed": "ca895c1303cc1d290f190cd7301d48fcef9e73e5"
            }
          ],
          "repo": "https://github.com/symfony/security-http",
          "type": "GIT"
        },
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.4.53"
              },
              {
                "introduced": "6.0.0"
              },
              {
                "fixed": "6.4.41"
              },
              {
                "introduced": "7.0.0"
              },
              {
                "fixed": "7.4.13"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.13"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6436e377f7a82a1e7b120da519c7c96a154ece2a"
            },
            {
              "introduced": "aa4e97099b5a67bdc9f2387fe8d099f5c712f81c"
            },
            {
              "fixed": "14ff191853ad60d640c0853b4f17fc0f3b4de0ae"
            },
            {
              "introduced": "d78c5f403d7ee794993660b1d5155536edd36fc1"
            },
            {
              "fixed": "d9981b6e4c77b97472845a9b7fcba5507208aacc"
            },
            {
              "introduced": "2e913a829cfbbf9cb38b321bdff1806b44b192eb"
            },
            {
              "fixed": "ad82cb517407582bb697e079c5ee62bf8b7af3b7"
            },
            {
              "fixed": "4b63c3a3f7af04ecd79c89a594b0b02a01990b1d"
            }
          ],
          "repo": "https://github.com/symfony/symfony",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-h5x3-xfc9-m39h"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-172",
      "CWE-601"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48784.json"
  },
  "details": "Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, UrlGenerator::doGenerate() used strtr() dot-segment encoding that skipped every other chained ../ or ./ segment, allowing attacker-controlled route parameters to generate URLs that collapse to a different path under RFC 3986 normalization. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.",
  "id": "CVE-2026-48784",
  "modified": "2026-08-12T03:51:29.721338094Z",
  "published": "2026-07-14T19:04:20.058Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v5.4.53"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v6.4.41"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v7.4.13"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48784.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48784"
    },
    {
      "type": "FIX",
      "url": "https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization"
}