CVE-2026-48806CWE-693CWE-863

Twig: Sandbox `__toString()` policy bypass via dynamic mapping keys

High · published July 14, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
35.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
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
EPSS
0.00418 · 35.0th percentile
Weaknesses
CWE-693 · Protection Mechanism Failure; CWE-863 · Incorrect Authorization
Published
2026-07-14T21:28Z
EPSS history
Timeline
  • 14 JUL 21:28Z
    Twig: Sandbox `__toString()` policy bypass via dynamic mapping keys
    cvelistv5