CVE-2026-48807

Twig: Sandbox `__toString()` policy bypass via `Traversable` in `join` and `replace` filters

Published Jul 14, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
Twig is a template language for PHP. Prior to 3.27.0, the sandbox __toString() checks do not fully cover Traversable values passed to join and replace filters or operands evaluated by the in and not in operators, allowing contained Stringable objects to be coerced to strings without consulting the sandbox policy. This issue is fixed in version 3.27.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-8x9c-rmqh-456c Twig: Sandbox `__toString()` policy bypass via `Traversable` in `join` and `replace` filters
History
Type Values Removed Values Added
First Time appeared Twigphp
Twigphp twig
Vendors & Products Twigphp
Twigphp twig
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Twig is a template language for PHP. Prior to 3.27.0, the sandbox __toString() checks do not fully cover Traversable values passed to join and replace filters or operands evaluated by the in and not in operators, allowing contained Stringable objects to be coerced to strings without consulting the sandbox policy. This issue is fixed in version 3.27.0.
Title Twig: Sandbox `__toString()` policy bypass via `Traversable` in `join` and `replace` filters
Weaknesses CWE-693
CWE-863
References
Metrics cvssV4_0

{'score': 7.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 15, 2026, 12:50 PM
Reserved
May 22, 2026, 8:57 PM
Status
Analyzed
Published
Jul 14, 2026, 10:17 PM
Modified
Oct 24, 2026, 10:10 PM