CVE-2026-44883

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From 2.33.0 to before 2.33.8, 2.39.2, and 2.41.0, Portainer's authentication middleware accepts JWT bearer tokens passed as the ?token=<JWT> URL query parameter on any authenticated API endpoint, in addition to the standard Authorization: Bearer header. URLs are recorded in reverse-proxy access logs, browser history, and HTTP Referer headers on outbound navigation, so any JWT passed this way can be harvested by anyone with access to those logs or by an external site the user subsequently visits. A leaked token grants the full privileges of the user it was issued to, until the token expires (default 8 hours, configurable). The ?token= parameter was used by Portainer's browser-based container attach, exec, and pod shell features, so any user with exec or attach rights on a container was exposed \u2014 not only administrators. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0."}, {"lang": "es", "value": "Portainer Community Edition es una plataforma ligera de entrega de servicios para aplicaciones en contenedores que puede usarse para gestionar entornos Docker, Swarm, Kubernetes y ACI. Desde 2.33.0 hasta antes de 2.33.8, 2.39.2 y 2.41.0, el middleware de autenticaci\u00f3n de Portainer acepta tokens portadores JWT pasados como el par\u00e1metro de consulta URL ?token=<JWT> en cualquier punto final de API autenticado, adem\u00e1s del encabezado est\u00e1ndar Authorization: Bearer. Las URL se registran en los registros de acceso del proxy inverso, el historial del navegador y los encabezados HTTP Referer en la navegaci\u00f3n saliente, por lo que cualquier JWT pasado de esta manera puede ser recolectado por cualquiera con acceso a esos registros o por un sitio externo que el usuario visite posteriormente. Un token filtrado otorga los privilegios completos del usuario al que fue emitido, hasta que el token expire (8 horas por defecto, configurable). El par\u00e1metro ?token= fue utilizado por las funciones de Portainer de adjuntar, ejecutar y shell de pod basadas en navegador para contenedores, por lo que cualquier usuario con derechos de ejecuci\u00f3n o adjuntar en un contenedor estuvo expuesto \u2014 no solo los administradores. Esta vulnerabilidad est\u00e1 corregida en 2.33.8, 2.39.2 y 2.41.0."}], "id": "CVE-2026-44883", "lastModified": "2026-07-21T10:10:00.103", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.7, "baseSeverity": "HIGH", "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": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-44883", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-02T13:46:34.014167Z", "version": "2.0.3"}}]}, "published": "2026-05-28T22:16:59.537", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/portainer/portainer/security/advisories/GHSA-jvp4-q659-95mj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/portainer/portainer/security/advisories/GHSA-jvp4-q659-95mj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-598"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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