CVE-2026-27945

{"id": "CVE-2026-27945", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/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": "PRESENT", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "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"}}]}, "published": "2026-02-26T01:16:25.800", "references": [{"url": "https://github.com/zitadel/zitadel/releases/tag/v3.4.7", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/zitadel/zitadel/releases/tag/v4.11.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-7777-fhq9-592v", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "ZITADEL is an open source identity management platform. Zitadel Action V2 (introduced as early preview in 2.59.0, beta in 3.0.0 and GA in 4.0.0) is a webhook based approach to allow developers act on API request to Zitadel and customize flows such the issue of a token. Zitadel's Action target URLs can point to local hosts, potentially allowing adversaries to gather internal network information and connect to internal services. When the URL points to a local host / IP address, an adversary might gather information about the internal network structure, the services exposed on internal hosts etc. This is sometimes called a Server-Side Request Forgery (SSRF). Zitadel Actions expect responses according to specific schemas, which reduces the threat vector. The patch in version 4.11.1 resolves the issue by checking the target URL against a denylist. By default localhost, resp. loopback IPs are denied. Note that this fix was only released on v4.x. Due to the stage (preview / beta) in which the functionality was in v2.x and v3.x, the changes that have been applied to it since then and the severity, respectively the actual thread vector, a backport to the corresponding versions was not feasible. Please check the workaround section for alternative solutions if an upgrade to v4.x is not possible. If an upgrade is not possible, prevent actions from using unintended endpoints by setting network policies or firewall rules in one's own infrastructure. Note that this is outside of the functionality provided by Zitadel."}, {"lang": "es", "value": "ZITADEL es una plataforma de gesti\u00f3n de identidad de c\u00f3digo abierto. Zitadel Action V2 (introducida como vista previa temprana en 2.59.0, beta en 3.0.0 y GA en 4.0.0) es un enfoque basado en webhooks para permitir a los desarrolladores actuar sobre peticiones API a Zitadel y personalizar flujos como la emisi\u00f3n de un token. Las URL de destino de las acciones de Zitadel pueden apuntar a hosts locales, lo que potencialmente permite a los adversarios recopilar informaci\u00f3n de la red interna y conectarse a servicios internos. Cuando la URL apunta a un host local / direcci\u00f3n IP, un adversario podr\u00eda recopilar informaci\u00f3n sobre la estructura de la red interna, los servicios expuestos en hosts internos, etc. Esto a veces se denomina falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF). Las acciones de Zitadel esperan respuestas seg\u00fan esquemas espec\u00edficos, lo que reduce el vector de amenaza. El parche en la versi\u00f3n 4.11.1 resuelve el problema comprobando la URL de destino contra una lista de denegaci\u00f3n. Por defecto, localhost, resp. las IP de bucle invertido son denegadas. Tenga en cuenta que esta correcci\u00f3n solo se lanz\u00f3 en v4.x. Debido a la etapa (vista previa / beta) en la que se encontraba la funcionalidad en v2.x y v3.x, los cambios que se le han aplicado desde entonces y la gravedad, respectivamente el vector de amenaza real, una retrocompatibilidad a las versiones correspondientes no fue factible. Consulte la secci\u00f3n de soluci\u00f3n alternativa para soluciones alternativas si una actualizaci\u00f3n a v4.x no es posible. Si una actualizaci\u00f3n no es posible, evite que las acciones utilicen puntos finales no deseados configurando pol\u00edticas de red o reglas de cortafuegos en la propia infraestructura. Tenga en cuenta que esto est\u00e1 fuera de la funcionalidad proporcionada por Zitadel."}], "lastModified": "2026-03-05T16:04:24.587", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "73FC526B-2AFD-4993-8601-63B7BE3AE63D", "versionEndIncluding": "3.4.6", "versionStartIncluding": "2.59.0"}, {"criteria": "cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13ECEC48-A3CD-4641-80F0-FA92B8317252", "versionEndExcluding": "4.11.1", "versionStartIncluding": "4.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}