CVE-2026-48805: Twig Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p42q-9prx-q5wq",
  "modified" : "2026-06-30T18:41:30Z",
  "published" : "2026-06-30T18:41:30Z",
  "aliases" : [ "CVE-2026-48805" ],
  "summary" : "Twig: Sandbox state regression in deprecated internal wrappers in `src/Resources/core.php`",
  "details" : "### Description\n\nThe 3.26.0 source-policy hardening changed the signature of `CoreExtension::checkArrow()` to take a boolean `$isSandboxed` instead of an `Environment`, and added the same `$isSandboxed` argument to `CoreExtension::arraySome()` and `CoreExtension::arrayEvery()`. Compiled templates were updated to pass the per-source sandbox state computed at the call site.\n\nThe deprecated internal wrappers exposed in `src/Resources/core.php` for legacy third-party code (`twig_check_arrow_in_sandbox()`, `twig_array_some()`, `twig_array_every()`) were not updated:\n\n- `twig_array_some()` and `twig_array_every()` call `CoreExtension::arraySome()` / `arrayEvery()` without forwarding the sandbox state. The underlying methods default `$isSandboxed` to `false`, so the callable-must-be-a-`Closure` restriction is silently bypassed in sandbox mode and a string callable such as `'strcmp'` is accepted.\n- `twig_check_arrow_in_sandbox()` passes the `Environment` object where `CoreExtension::checkArrow()` now expects a `bool`, which throws a `TypeError` on PHP 8+.\n\nCompiled Twig templates are not affected: they call `CoreExtension::*` directly with the correct arguments. Applications are only impacted if they still call the deprecated `twig_*` helpers on top of a sandboxed `Environment`.\n\n### Resolution\n\nThe three wrappers now resolve the current sandbox state via `twig_resolve_is_sandboxed()` (the same helper compiled templates use), and forward it to the corresponding `CoreExtension::*` method. `twig_check_arrow_in_sandbox()` no longer triggers a `TypeError`, and `twig_array_some()` / `twig_array_every()` now enforce the same sandbox restriction as compiled templates.\n\n### Credits\n\nWe would like to thank El Kharoubi Iosif for reporting the issue and Fabien Potencier for providing the fix.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "twig/twig"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.27.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.26.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/twigphp/Twig/security/advisories/GHSA-p42q-9prx-q5wq"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2026-48805.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/twigphp/Twig"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/twigphp/Twig/releases/tag/v3.27.0"
  }, {
    "type" : "WEB",
    "url" : "https://symfony.com/blog/cve-2026-48805-sandbox-state-regression-in-deprecated-internal-wrappers-in-src-resources-core-php"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-693" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-30T18:41:30Z",
    "nvd_published_at" : null
  }
}