Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to 4.5.7 and 5.8.2, depending on the release line, Smarty's {fetch} handling in libs/plugins/function.fetch.php and src/FunctionHandler/Fetch.php used Security::isTrustedUri() to validate only the initial remote URL against trusted_uri when a security policy was active. For resources handled by file_get_contents(), including HTTPS URLs, PHP followed HTTP redirects by default. An attacker who could supply or influence a fetch target and had an open redirect on a trusted host could redirect the request to an attacker-chosen internal endpoint, bypass the trusted_uri allowlist, and perform server-side request forgery. This issue is fixed in versions 4.5.7 and 5.8.2.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-918"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62993.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.8.2"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.5.7"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "31e06fc087a8b5a9b236c1e5dacc1c2850a2c115"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "a1ccdb0518021a559b4066c37b76a42c86bbce90"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v4.5.7",
"range": [
{
"fixed": "838d6ad1c635f8a6bafc08d791b8af18d8304b3a"
}
],
"source": "REFERENCES_TAG"
},
{
"original_tag": "v5.8.2",
"range": [
{
"fixed": "06594a114931ab6fea76b12f0207c5903cf01f8c"
}
],
"source": "REFERENCES_TAG"
}
]
}