CVE-2026-48807 PUBLISHED

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

Assigner: GitHub_M
Reserved: 22.05.2026 Published: 14.07.2026 Updated: 15.07.2026

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.

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	twigphp
Product	Twig
Versions	Version < 3.27.0 is affected

References

Problem Types

CWE-693: Protection Mechanism Failure CWE
CWE-863: Incorrect Authorization CWE