High 7.1Published Jul 14, 2026

CVE-2026-48806Twig: Sandbox `__toString()` policy bypass via dynamic mapping keys

Updated under an hour ago (Oct 27, 2026, 7:30 PM ET)

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It affects twigphp Twig and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for twigphp Twig

Exploited in the last 30 days

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: 7.1 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-693, CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

twigphp Twig twigphp:twig (from the name)	before 3.27.0	CNA record
symfony twig symfony:twig	before 3.27.0	NVD

References

References

https://github.com/twigphp/Twig/security/advisories/GHSA-5v5v-ww74-355v	x-refsource-confirm, vendor-advisory
https://github.com/twigphp/Twig/commit/9ff41014639ef0e8eb50ac7669191c309d863105	x-refsource-misc, patch
https://github.com/twigphp/Twig/releases/tag/v3.27.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.