CWE-693: Protection Mechanism Failure in twigphp Twig (CVE-2026-48807)
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.
AI Analysis
Technical Summary
The vulnerability in twig/twig versions prior to 3.27.0 involves a sandbox bypass related to the __toString() method. Specifically, when sandboxed templates use the join and replace filters with Traversable inputs or the in and not in operators, the sandbox policy does not recursively verify Stringable objects inside Traversable containers or operands coerced to strings. This allows sandboxed template authors to invoke __toString() on objects that should be restricted, bypassing the intended sandbox policy enforcement. The issue is categorized under CWE-693 (Protection Mechanism Failure) and CWE-863 (Incorrect Authorization).
Potential Impact
Sandboxed template authors can bypass sandbox restrictions to invoke the __toString() method on objects that should be protected. This could lead to unauthorized code execution paths or information disclosure within the context of template rendering. The vulnerability is rated medium severity and no known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in twig/twig version 3.27.0 and later. Users should upgrade to version 3.27.0 or newer to remediate this vulnerability. Patch status is confirmed by the version boundary provided. No vendor advisory content was provided, so check the official twig/twig release notes or security advisories for confirmation and additional guidance.
CWE-693: Protection Mechanism Failure in twigphp Twig (CVE-2026-48807)
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.
CVSS v4.0
Score 7.1high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in twig/twig versions prior to 3.27.0 involves a sandbox bypass related to the __toString() method. Specifically, when sandboxed templates use the join and replace filters with Traversable inputs or the in and not in operators, the sandbox policy does not recursively verify Stringable objects inside Traversable containers or operands coerced to strings. This allows sandboxed template authors to invoke __toString() on objects that should be restricted, bypassing the intended sandbox policy enforcement. The issue is categorized under CWE-693 (Protection Mechanism Failure) and CWE-863 (Incorrect Authorization).
Potential Impact
Sandboxed template authors can bypass sandbox restrictions to invoke the __toString() method on objects that should be protected. This could lead to unauthorized code execution paths or information disclosure within the context of template rendering. The vulnerability is rated medium severity and no known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in twig/twig version 3.27.0 and later. Users should upgrade to version 3.27.0 or newer to remediate this vulnerability. Patch status is confirmed by the version boundary provided. No vendor advisory content was provided, so check the official twig/twig release notes or security advisories for confirmation and additional guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-8x9c-rmqh-456c
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-48807"]
- Ecosystems
- ["Packagist"]
- Database Specific Severity
- MODERATE
- Cvss Version
- null
Threat ID: 6a4452e027e9c797198e1086
Added to database: 06/30/2026, 23:36:00 UTC
Last enriched: 07/15/2026, 07:56:04 UTC
Last updated: 07/31/2026, 19:24:50 UTC
Views: 76
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