CVE-2026-57522

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When an organization has configured an event integration whose template references a user-controlled token (such as #ActingUserName# or #UserName#, populated from a member's display name), an authenticated member can set their display name to JSON metacharacters and inject arbitrary key-value pairs into the rendered payloads delivered to webhook, SIEM, Slack, Teams, or Datadog endpoints, making injected fields indistinguishable from legitimate template output."}, {"lang": "es", "value": "El Servidor Bitwarden anterior a 2026.5.0 contiene una vulnerabilidad de inyecci\u00f3n JSON en IntegrationTemplateProcessor.ReplaceTokens(), que sustituye valores controlados por el usuario en plantillas de integraci\u00f3n de eventos sin codificaci\u00f3n JSON. Cuando una organizaci\u00f3n ha configurado una integraci\u00f3n de eventos cuya plantilla hace referencia a un token controlado por el usuario (como #ActingUserName# o #UserName#, rellenado a partir del nombre de visualizaci\u00f3n de un miembro), un miembro autenticado puede establecer su nombre de visualizaci\u00f3n a metacaracteres JSON e inyectar pares clave-valor arbitrarios en las cargas \u00fatiles renderizadas entregadas a puntos finales de webhook, SIEM, Slack, Teams o Datadog, haciendo que los campos inyectados sean indistinguibles de la salida leg\u00edtima de la plantilla."}], "id": "CVE-2026-57522", "lastModified": "2026-10-25T22:10:00.150", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "disclosure@vulncheck.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-57522", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-26T14:04:15.668971Z", "version": "2.0.3"}}]}, "published": "2026-06-25T20:17:17.377", "references": [{"source": "disclosure@vulncheck.com", "tags": ["Patch"], "url": "https://github.com/bitwarden/server/commit/a26afd18130ef985ede5c97d277820d045185a28"}, {"source": "disclosure@vulncheck.com", "tags": ["Issue Tracking"], "url": "https://github.com/bitwarden/server/pull/7593"}, {"source": "disclosure@vulncheck.com", "tags": ["Release Notes"], "url": "https://github.com/bitwarden/server/releases/tag/v2026.5.0"}, {"source": "disclosure@vulncheck.com", "tags": ["Exploit", "Patch", "Third Party Advisory"], "url": "https://sanjokkarki.com.np/blog/bitwarden-webhook-json-injection"}, {"source": "disclosure@vulncheck.com", "tags": ["Third Party Advisory"], "url": "https://www.vulncheck.com/advisories/bitwarden-server-json-injection-via-webhook-templates"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-74"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

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