---
id: CVE-2026-62993
title: >-
  Smarty is a template engine for PHP, facilitating the separation of
  presentation (HTML/CSS) from application logic
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…
severity: medium
cwe:
  - CWE-918
vendor: smarty
product: smarty/smarty
affected:
  - 'smarty/smarty >= 5.0.0, < 5.8.2'
  - smarty/smarty < 4.5.7
patched:
  - smarty/smarty 5.8.2
  - smarty/smarty 4.5.7
published: '2026-08-31'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:11:31.703'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62993'
references:
  - url: >-
      https://github.com/smarty-php/smarty/commit/31e06fc087a8b5a9b236c1e5dacc1c2850a2c115
    label: security-advisories@github.com
  - url: >-
      https://github.com/smarty-php/smarty/commit/a1ccdb0518021a559b4066c37b76a42c86bbce90
    label: security-advisories@github.com
  - url: 'https://github.com/smarty-php/smarty/pull/1194'
    label: security-advisories@github.com
  - url: 'https://github.com/smarty-php/smarty/releases/tag/v4.5.7'
    label: security-advisories@github.com
  - url: 'https://github.com/smarty-php/smarty/releases/tag/v5.8.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/smarty-php/smarty/security/advisories/GHSA-cq55-c7wv-pxmq
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62993'
  - url: 'https://github.com/advisories/GHSA-cq55-c7wv-pxmq'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62993.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-62993'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-62993'
tags:
  - nvd
  - ghsa
  - composer
  - csaf
  - vex
  - red-hat
epss: 0.00574
epssPercentile: 0.44983
aliases:
  - GHSA-cq55-c7wv-pxmq
ecosystem: composer
ingestedAt: '2026-09-01T17:29:54.760Z'
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'
cvssSource: vendor
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-62993)

Affected packages:

- `smarty/smarty >= 5.0.0, < 5.8.2`
- `smarty/smarty < 4.5.7`

Patched in:

- `smarty/smarty 5.8.2`
- `smarty/smarty 4.5.7`

Source: https://github.com/advisories/GHSA-cq55-c7wv-pxmq

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62993.json)