CVE-2026-48806: Auth Bypass

Description

Twig is a template language for PHP. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxExtension::ensureToStringAllowed(). This issue is fixed in version 3.27.0.

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Weakness Type (CWE)

CWE-693 CWE-693

CWE-863 Incorrect Authorization

References

Other References

https://github.com/twigphp/Twig/commit/9ff41014639ef0e8eb50ac7669191c309d863105 https://github.com/twigphp/Twig/releases/tag/v3.27.0 https://github.com/twigphp/Twig/security/advisories/GHSA-5v5v-ww74-355v

Frequently Asked Questions

What is CVE-2026-48806? +

Twig is a template language for PHP. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxExtension::ensureToStringAllowed(). This issue is fixed in version 3.27.0.

How do I check if I'm vulnerable to CVE-2026-48806? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-48806