Grav: Incomplete callable validation in blueprint dynamic fields allows arbitrary static method invocation and file disclosure

{
  "id": "903097647d7551c6517b17796b9a6b69903a9603f98cc2e287d73e96862628ad",
  "url": "https://osv.dev/vulnerability/GHSA-7pgq-cr25-xvc8",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Grav: Incomplete callable validation in blueprint dynamic fields allows arbitrary static method invocation and file disclosure",
    "summary": "### Summary Grav CMS's blueprint dynamic-field callable guard can be bypassed with a fully-qualified `Class::method` string, letting an account with only page-editing rights (`admin.pages`, not super-admin) plant a directive in a page's form-field frontmatter that invokes an arbitrary public static PHP method with attacker-controlled arguments. Using built-in gadget methods this yields, at minimum, arbitrary reading of any server-readable file (disclosed to anonymous visitors of the crafted page) and arbitrary creation/copying of files and directories under the web-server account. ### Details `Blueprint::isSafeDynamicCall()` (`system/src/Grav/Common/Data/Blueprint.php`, method around line 488) is meant to block dangerous callables named in a blueprint's dynamic-field directives (`data-*@`). It only consults its dangerous-name denylist when the callable string does **not** contain `::`: ```php if (is_string($function) && !str_contains($function, '::') && Utils::isDangerousFunction($function)) { return false; } ``` Any callable string containing `::` — i.e. every `Class::method` static call — skips the check entirely and is passed to `call_user_func_array()` at `Blueprint::dynamicData()` (`Blueprint.php`, around line 461) and `FlexDirectory::dynamicDataField()` (`system/src/Grav/Framework/Flex/FlexDirectory.php`, around line 937). There is no allowlist restricting which classes or methods may be invoked this way; only the call's *arguments* are (separately) scanned for smuggled",
    "evidence": "osv:GHSA-7pgq-cr25-xvc8",
    "products": [
      {
        "name": {
          "value": "getgrav/grav",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.0.11",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "2.0.10",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.8",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0.9",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "GHSA-7pgq-cr25-xvc8",
      "aliases": [
        "CVE-2026-69088",
        "GHSA-7pgq-cr25-xvc8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.0.7"
                },
                {
                  "fixed": "2.0.11"
                }
              ]
            }
          ],
          "package": {
            "name": "getgrav/grav",
            "purl": "pkg:composer/getgrav/grav",
            "ecosystem": "Packagist"
          },
          "versions": [
            "2.0.10",
            "2.0.7",
            "2.0.8",
            "2.0.9"
          ],
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-7pgq-cr25-xvc8/GHSA-7pgq-cr25-xvc8.json",
            "last_known_affected_version_range": "<= 2.0.10"
          }
        }
      ],
      "modified": "2026-10-26T15:00:05.318682585Z",
      "provider": "osv",
      "references": [
        "https://github.com/getgrav/grav/security/advisories/GHSA-7pgq-cr25-xvc8",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-69088",
        "https://github.com/getgrav/grav/commit/446d7f8f255918c8234634fe1dc2c9c77a0c673e",
        "https://github.com/getgrav/grav",
        "https://github.com/getgrav/grav/releases/tag/2.0.11",
        "https://www.vulncheck.com/advisories/grav-cms-through-arbitrary-method-invocation-via-blueprint"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-470",
          "CWE-94"
        ],
        "severity": "HIGH",
        "github_reviewed": true,
        "nvd_published_at": null,
        "github_reviewed_at": "2026-09-17T17:16:39Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-69088",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 454249,
  "published_at": "2026-09-17T17:16:39+00:00"
}