CVE-2026-62993 (GCVE-0-2026-62993)

Vulnerability from cvelistv5 – Published: 2026-08-31 20:58 – Updated: 2026-08-31 20:58
VLAI
Title
Smarty: SSRF via redirect bypass of trusted_uri using {fetch}
Summary
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.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Impacted products
Vendor Product Version CPE status
smarty-php smarty Affected: >= 5.0.0, < 5.8.2
Affected: < 4.5.7
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "smarty",
          "vendor": "smarty-php",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.8.2"
            },
            {
              "status": "affected",
              "version": "\u003c 4.5.7"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s {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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-31T20:58:03.616Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/smarty-php/smarty/security/advisories/GHSA-cq55-c7wv-pxmq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/smarty-php/smarty/security/advisories/GHSA-cq55-c7wv-pxmq"
        },
        {
          "name": "https://github.com/smarty-php/smarty/pull/1194",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/smarty-php/smarty/pull/1194"
        },
        {
          "name": "https://github.com/smarty-php/smarty/commit/31e06fc087a8b5a9b236c1e5dacc1c2850a2c115",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/smarty-php/smarty/commit/31e06fc087a8b5a9b236c1e5dacc1c2850a2c115"
        },
        {
          "name": "https://github.com/smarty-php/smarty/commit/a1ccdb0518021a559b4066c37b76a42c86bbce90",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/smarty-php/smarty/commit/a1ccdb0518021a559b4066c37b76a42c86bbce90"
        },
        {
          "name": "https://github.com/smarty-php/smarty/releases/tag/v4.5.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/smarty-php/smarty/releases/tag/v4.5.7"
        },
        {
          "name": "https://github.com/smarty-php/smarty/releases/tag/v5.8.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/smarty-php/smarty/releases/tag/v5.8.2"
        }
      ],
      "source": {
        "advisory": "GHSA-cq55-c7wv-pxmq",
        "discovery": "UNKNOWN"
      },
      "title": "Smarty: SSRF via redirect bypass of trusted_uri using {fetch}"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-62993",
    "datePublished": "2026-08-31T20:58:03.616Z",
    "dateReserved": "2026-07-14T23:10:57.031Z",
    "dateUpdated": "2026-08-31T20:58:03.616Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-62993",
      "date": "2026-09-01",
      "epss": "0.0042",
      "percentile": "0.35064"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-62993\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-31T21:17:33.170\",\"lastModified\":\"2026-08-31T21:17:33.170\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\u0027s {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.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"smarty-php\",\"product\":\"smarty\",\"versions\":[{\"version\":\"\u003e= 5.0.0, \u003c 5.8.2\",\"status\":\"affected\"},{\"version\":\"\u003c 4.5.7\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/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\",\"baseScore\":6.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"HIGH\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"}]}],\"references\":[{\"url\":\"https://github.com/smarty-php/smarty/commit/31e06fc087a8b5a9b236c1e5dacc1c2850a2c115\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/smarty-php/smarty/commit/a1ccdb0518021a559b4066c37b76a42c86bbce90\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/smarty-php/smarty/pull/1194\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/smarty-php/smarty/releases/tag/v4.5.7\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/smarty-php/smarty/releases/tag/v5.8.2\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/smarty-php/smarty/security/advisories/GHSA-cq55-c7wv-pxmq\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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