{
  "affected": [
    {
      "affectedData": [
        {
          "product": "smarty",
          "vendor": "smarty-php",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.8.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. From 5.0.0 until 5.8.4, Smarty\u0027s stream: resource-name handling does not adequately restrict which PHP stream wrappers and filter chains can be referenced from a template, allowing a php://filter-wrapped resource name to be used to read the contents of arbitrary local files accessible to the PHP process. An attacker able to author or influence a template\u0027s resource reference could exploit this to disclose sensitive file contents outside the intended template/config scope. This issue is fixed in version 5.8.4."
    }
  ],
  "id": "CVE-2026-62996",
  "lastModified": "2026-08-07T18:17:19.953",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-62996",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-07T17:06:32.844811Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-07T16:17:26.000",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/smarty-php/smarty/commit/3c9f77a2e06ce319ae0092496af32cc8f3adc52e"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/smarty-php/smarty/pull/1195"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/smarty-php/smarty/releases/tag/v5.8.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/smarty-php/smarty/security/advisories/GHSA-rjhh-76wf-8xmw"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/smarty-php/smarty/security/advisories/GHSA-rjhh-76wf-8xmw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "smarty/smarty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.8.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-62996"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-07T15:10:51Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "`smarty/smarty` version `5.8.0` can read local files through PHP stream wrappers even when Smarty Security is enabled and all streams are disabled with `Security::$streams = null`.\n\nThe bypass uses Smarty\u0027s built-in `stream:` resource type. A template such as:\n\n```smarty\n{include file=\"stream:php://filter/read=convert.base64-encode/resource=/tmp/secret.tpl\"}\n```\n\nis handled as Smarty resource type `stream`, so the security check that would normally reject the underlying `php` wrapper is not applied. `StreamPlugin` then opens the nested `php://filter/...` URI directly.\n\nFor comparison, the direct resource:\n\n```smarty\n{include file=\"php://filter/read=convert.base64-encode/resource=/tmp/secret.tpl\"}\n```\n\nis blocked with `stream \u0027php\u0027 not allowed by security setting`.\n\nAffected package:\n\n- Ecosystem: Packagist / Composer\n- Package: `smarty/smarty`\n- Confirmed affected version: `5.8.0`\n- Confirmed source reference from Composer lock: `78d259d3b971c59a0cd719c270cc5cbb740c36a7`\n- Current stable version on Packagist at review time: `v5.8.0`\n- Packagist usage at review time: 41,113,855 total downloads and 840,604 monthly downloads\n\nRelevant code paths:\n\n- `Smarty\\Resource\\BasePlugin::load(...)`\n- `Smarty\\Resource\\StreamPlugin::getContent(...)`\n- `Smarty\\Security::isTrustedStream(...)`\n\n`BasePlugin::load()` maps the built-in resource name `stream` directly to `StreamPlugin` before the code path that checks PHP stream wrappers with `stream_get_wrappers()` and `Security::isTrustedStream($type)`. `StreamPlugin::getContent()` later calls `fopen($filepath, \u0027r+\u0027)` on the nested URI when the resource name contains `://`.\n\nPreconditions:\n\nAn application must render templates that are not fully trusted while relying on Smarty Security to restrict local files and PHP stream wrappers. The PoC sets:\n\n```php\n$smarty-\u003eenableSecurity();\n$smarty-\u003esecurity_policy-\u003estreams = null;\n```\n\nLocal reproduction:\n\nThe PoC creates a disposable template directory and a separate outside directory. It enables Smarty Security, disables all streams, and then compares three includes:\n\n1. `../outside/secret.tpl` to confirm the ordinary trusted-directory boundary is enforced.\n2. `php://filter/...` to confirm direct PHP streams are blocked by `Security::$streams = null`.\n3. `stream:php://filter/...` to show the built-in `stream:` resource bypasses the same restriction and reads the outside file.\n\nRun:\n\n```shell\nphp -d display_errors=1 poc.php\n```\n\nObserved sanitized output:\n\n```text\npackage=smarty/smarty\ninstalled_version=v5.8.0\ntemplate_dir=\u003ctmp\u003e/templates\noutside_template=\u003ctmp\u003e/outside/secret.tpl\nplain_dotdot_include=BLOCKED:Smarty\\Exception:Smarty Security: not trusted file path \u0027\u003ctmp\u003e/outside/secret.tpl\u0027\ndirect_php_filter_include=BLOCKED:Smarty\\Exception:stream \u0027php\u0027 not allowed by security setting\nstream_php_filter_include=OK:U01BUlRZX1NUUkVBTV9XUkFQUEVSX1NFQ1VSSVRZX0VTQ0FQRQ==\nexpected_base64=U01BUlRZX1NUUkVBTV9XUkFQUEVSX1NFQ1VSSVRZX0VTQ0FQRQ==\n```\n\nThe `plain_dotdot_include` line shows the directory boundary is enforced for ordinary traversal. The `direct_php_filter_include` line shows the same policy rejects `php://filter` when used directly. The `stream_php_filter_include` line shows that wrapping the same URI in Smarty\u0027s `stream:` resource bypasses that restriction and reads the outside file.\n\nImpact:\n\nA template author can bypass Smarty Security stream restrictions and read local files that are readable by the PHP process. With `php://filter`, file contents can be base64 encoded and rendered back through the template. This bypasses both the intended `Security::$streams = null` restriction and the normal trusted-template-directory check that blocks `../` traversal.\n\nDuplicate checks:\n\n- OSV query for `Packagist/smarty/smarty` version `5.8.0` returned no vulnerabilities.\n- GitHub advisory query for `ecosystem=composer` and `affects=smarty/smarty` returned historical Smarty advisories, including sandbox escapes, PHP code injection, XSS, and older path traversal issues. The listed path traversal advisories affect older versions and do not describe this current `stream:php://filter` resource-wrapper bypass in 5.8.0.\n- GitHub issue search in `smarty-php/smarty` for `stream:php://filter` returned zero results.\n- Public searches for `Smarty StreamPlugin php://filter` and `smarty/smarty isTrustedStream stream:` did not identify a clear public duplicate during triage.\n\nSuggested remediation:\n\nWhen resolving the built-in `stream:` resource, parse and validate the nested URI scheme before opening it. For example, `stream:php://filter/...` should call `Security::isTrustedStream(\u0027php\u0027)`, and `Security::$streams = null` should block the resource before `StreamPlugin::getContent()` reaches `fopen()`.\n\nIt would also be safer for `StreamPlugin` to reject nested stream wrappers by default unless the underlying wrapper is explicitly allowed by the active security policy.",
  "id": "GHSA-rjhh-76wf-8xmw",
  "modified": "2026-08-07T15:10:51Z",
  "published": "2026-08-07T15:10:51Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/smarty-php/smarty/security/advisories/GHSA-rjhh-76wf-8xmw"
    },
    {
      "type": "WEB",
      "url": "https://github.com/smarty-php/smarty/pull/1195"
    },
    {
      "type": "WEB",
      "url": "https://github.com/smarty-php/smarty/commit/3c9f77a2e06ce319ae0092496af32cc8f3adc52e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/smarty-php/smarty"
    },
    {
      "type": "WEB",
      "url": "https://github.com/smarty-php/smarty/releases/tag/v5.8.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Smarty Security stream restriction bypass through stream: resource"
}