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Vulnerability record · CVE-2026-48806 · published 14 July 2026

CVE-2026-48806: Symfony twig incorrect authorization vulnerability

Symfony · Twig

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.

7.1 CVSS 4.0 High EPSS 0.42% · top 66.4% CWE-693 · CWE-693CWE-863 · Incorrect authorization
7.1CVSS 4.0 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-48806), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.