Incorrect Authorization Affecting twig/twig package, versions <3.27.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-TWIGTWIG-17111518
- published31 May 2026
- disclosed27 May 2026
- creditEl Kharoubi Iosif
Introduced: 27 May 2026
CVE-2026-48806 (opens in a new tab)How to fix?
Upgrade twig/twig to version 3.27.0 or higher.
Overview
twig/twig is a flexible, fast, and secure template language for PHP.
Affected versions of this package are vulnerable to Incorrect Authorization via dynamic mapping key handling in ArrayExpression. An attacker can bypass the sandbox __toString() restrictions by using a stringable object as a dynamic mapping key, causing PHP to invoke __toString() during key coercion without calling SandboxExtension::ensureToStringAllowed(). This allows unauthorized access to data exposed through __toString() methods on objects reachable from the render context.
Note:
Direct output of the same object remains blocked by the sandbox. The issue only occurs when the object is used as a dynamic mapping key.
This vulnerability is a bypass of the fix for CVE-2026-47732.