CVE-2026-27886

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{"affected": [{"affectedData": [{"product": "strapi", "vendor": "strapi", "versions": [{"status": "affected", "version": ">= 4.0.0, < 5.37.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:strapi:strapi:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "B26282D5-D04D-4F7A-9BDC-870D8C8A21D3", "versionEndExcluding": "5.37.0", "versionStartIncluding": "4.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Strapi is an open source headless content management system. Strapi versions starting in 4.0.0 and prior to 5.37.0 did not sufficiently sanitize query parameters when filtering content via relational fields. An unauthenticated attacker could use the `where` query parameter on any publicly-accessible content-type with an `updatedBy` (or other admin-relation) field to perform a boolean-oracle attack against private fields on the joined `admin_users` table, including the `resetPasswordToken` field. Extracting an admin reset token via this oracle made full administrative account takeover possible without authentication. When a filter such as `where[updatedBy][resetPasswordToken][$startsWith]=a` was applied to a public Content API endpoint, the underlying query generation performed a `LEFT JOIN` against the `admin_users` table and emitted a `WHERE` clause referencing the joined column. The query parameter sanitization layer did not block operator chains that traversed into relational target schemas the caller had no read permission on, allowing the response count to be used as a one-bit oracle on any admin-table field. The patch in version 5.37.0 introduces explicit query-parameter sanitization at the controller and service boundary via three new primitives: `strictParam`, `addQueryParams`, and `addBodyParams`. Operator chains that traverse into restricted relational targets are now rejected before reaching the database."}, {"lang": "es", "value": "Strapi es un sistema de gesti\u00f3n de contenido \u2019headless\u2019 de c\u00f3digo abierto. Las versiones de Strapi a partir de la 4.0.0 y anteriores a la 5.37.0 no sanitizaban suficientemente los par\u00e1metros de consulta al filtrar contenido a trav\u00e9s de campos relacionales. Un atacante no autenticado podr\u00eda usar el par\u00e1metro de consulta \u2019where\u2019 en cualquier tipo de contenido de acceso p\u00fablico con un campo \u2019updatedBy\u2019 (u otra relaci\u00f3n de administrador) para realizar un ataque de or\u00e1culo booleano contra campos privados en la tabla \u2019admin_users\u2019 unida, incluyendo el campo \u2019resetPasswordToken\u2019. La extracci\u00f3n de un token de restablecimiento de administrador a trav\u00e9s de este or\u00e1culo hizo posible la toma de control total de la cuenta administrativa sin autenticaci\u00f3n. Cuando se aplicaba un filtro como \u2019where[updatedBy][resetPasswordToken][$startsWith]=a\u2019 a un endpoint de la API de Contenido p\u00fablico, la generaci\u00f3n de consulta subyacente realizaba un \u2019LEFT JOIN\u2019 contra la tabla \u2019admin_users\u2019 y emit\u00eda una cl\u00e1usula \u2019WHERE\u2019 que hac\u00eda referencia a la columna unida. La capa de sanitizaci\u00f3n de par\u00e1metros de consulta no bloqueaba las cadenas de operadores que atravesaban esquemas de destino relacionales sobre los cuales el llamador no ten\u00eda permiso de lectura, permitiendo que el recuento de la respuesta se utilizara como un or\u00e1culo de un bit en cualquier campo de la tabla de administrador. El parche en la versi\u00f3n 5.37.0 introduce una sanitizaci\u00f3n expl\u00edcita de par\u00e1metros de consulta en el l\u00edmite del controlador y del servicio a trav\u00e9s de tres nuevas primitivas: \u2019strictParam\u2019, \u2019addQueryParams\u2019 y \u2019addBodyParams\u2019. Las cadenas de operadores que atraviesan objetivos relacionales restringidos ahora son rechazadas antes de llegar a la base de datos."}], "id": "CVE-2026-27886", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.2, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-27886", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-14T19:38:33.514090Z", "version": "2.0.3"}}]}, "published": "2026-05-14T19:16:31.580", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/strapi/strapi/security/advisories/GHSA-rjg2-95x7-8qmx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-943"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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