UBUNTU-CVE-2026-48806
Twig, a PHP template language, has a vulnerability in versions prior to 3.27.0 where ArrayExpression does not properly guard dynamic mapping keys coerced to strings. This allows PHP to invoke the __toString() method on a Stringable object used as a mapping key without SandboxExtension::ensureToStringAllowed() being called. The issue is fixed in version 3.27.0.
AI Analysis
Technical Summary
The vulnerability in php-twig prior to version 3.27.0 involves the ArrayExpression component failing to guard dynamic mapping keys that are coerced to strings. This flaw permits PHP to call the __toString() method on a Stringable object used as a mapping key without the sandbox security check SandboxExtension::ensureToStringAllowed(). This could potentially bypass sandbox restrictions. The vulnerability is resolved in version 3.27.0.
Potential Impact
This vulnerability could allow bypassing of sandbox restrictions in Twig templates by invoking __toString() on objects without proper authorization checks. This may lead to unintended code execution or information disclosure within the context of Twig template rendering. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade php-twig to version 3.27.0 or later where this vulnerability is fixed. Since the affected versions are explicitly listed, ensure that none of these vulnerable versions are in use. Patch status is confirmed fixed in 3.27.0. No other mitigations are indicated.
UBUNTU-CVE-2026-48806
Description
Twig, a PHP template language, has a vulnerability in versions prior to 3.27.0 where ArrayExpression does not properly guard dynamic mapping keys coerced to strings. This allows PHP to invoke the __toString() method on a Stringable object used as a mapping key without SandboxExtension::ensureToStringAllowed() being called. The issue is fixed in version 3.27.0.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]~esm2?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+esm2?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]~esm1?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in php-twig prior to version 3.27.0 involves the ArrayExpression component failing to guard dynamic mapping keys that are coerced to strings. This flaw permits PHP to call the __toString() method on a Stringable object used as a mapping key without the sandbox security check SandboxExtension::ensureToStringAllowed(). This could potentially bypass sandbox restrictions. The vulnerability is resolved in version 3.27.0.
Potential Impact
This vulnerability could allow bypassing of sandbox restrictions in Twig templates by invoking __toString() on objects without proper authorization checks. This may lead to unintended code execution or information disclosure within the context of Twig template rendering. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade php-twig to version 3.27.0 or later where this vulnerability is fixed. Since the affected versions are explicitly listed, ensure that none of these vulnerable versions are in use. Patch status is confirmed fixed in 3.27.0. No other mitigations are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-48806
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:Pro:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b49568715ace43da7e1f
Added to database: 07/16/2026, 10:38:13 UTC
Last enriched: 07/16/2026, 12:26:28 UTC
Last updated: 07/16/2026, 12:26:28 UTC
Views: 2
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