CVE-2026-46640

Twig is a template language for PHP. From 3.15.0 until 3.26.0, _self.(<string>) and import-alias dynamic attribute syntax can concatenate an attacker-controlled string into a MacroReferenceExpression name without identifier validation, causing raw PHP to be emitted into the generated template source and executed at template-load time. This issue is fixed in version 3.26.0.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/twigphp/Twig/commit/324fa60545694fa6abe85ded9befcb82e1066bc2	Patch
https://github.com/twigphp/Twig/releases/tag/v3.26.0	Release Notes
https://github.com/twigphp/Twig/security/advisories/GHSA-45vw-wh46-2vx8	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:symfony:twig:*:*:*:*:*:*:*:*

History

24 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Twig es un lenguaje de plantillas para PHP. Desde la versión 3.15.0 hasta la 3.26.0, _self.([string]) y la sintaxis de atributo dinámico import-alias pueden concatenar una cadena controlada por un atacante en un nombre de MacroReferenceExpression sin validación de identificador, lo que provoca que se emita PHP sin procesar en el código fuente de la plantilla generada y se ejecute en el momento de la carga de la plantilla. Este problema está corregido en la versión 3.26.0.

Information

Published : 2026-07-14 22:16

Updated : 2026-10-24 22:10

NVD link : CVE-2026-46640

Mitre link : CVE-2026-46640

CVE.ORG link : CVE-2026-46640

JSON object : View

Products Affected

symfony

twig

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

{"id": "CVE-2026-46640", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46640", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-15T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "twigphp", "product": "Twig", "versions": [{"status": "affected", "version": ">= 3.15.0, < 3.26.0"}]}]}], "published": "2026-07-14T22:16:56.840", "references": [{"url": "https://github.com/twigphp/Twig/commit/324fa60545694fa6abe85ded9befcb82e1066bc2", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/twigphp/Twig/releases/tag/v3.26.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/twigphp/Twig/security/advisories/GHSA-45vw-wh46-2vx8", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-94"}]}], "descriptions": [{"lang": "en", "value": "Twig is a template language for PHP. From 3.15.0 until 3.26.0, _self.(<string>) and import-alias dynamic attribute syntax can concatenate an attacker-controlled string into a MacroReferenceExpression name without identifier validation, causing raw PHP to be emitted into the generated template source and executed at template-load time. This issue is fixed in version 3.26.0."}, {"lang": "es", "value": "Twig es un lenguaje de plantillas para PHP. Desde la versi\u00f3n 3.15.0 hasta la 3.26.0, _self.([string]) y la sintaxis de atributo din\u00e1mico import-alias pueden concatenar una cadena controlada por un atacante en un nombre de MacroReferenceExpression sin validaci\u00f3n de identificador, lo que provoca que se emita PHP sin procesar en el c\u00f3digo fuente de la plantilla generada y se ejecute en el momento de la carga de la plantilla. Este problema est\u00e1 corregido en la versi\u00f3n 3.26.0."}], "lastModified": "2026-10-24T22:10:00.210", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:symfony:twig:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D53EE105-E789-42FE-8447-8C48CC159B45", "versionEndExcluding": "3.26.0", "versionStartIncluding": "3.15.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}