CVE-2026-21887

{"id": "CVE-2026-21887", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 3.1}]}, "published": "2026-03-12T17:16:36.813", "references": [{"url": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-ffm6-vvph-g5f5", "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": "OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.8.16, the OpenCTI platform\u2019s data ingestion feature accepts user-supplied URLs without validation and uses the Axios HTTP client with its default configuration (allowAbsoluteUrls: true). This allows attackers to craft requests to arbitrary endpoints, including internal services, because Axios will accept and process absolute URLs. This results in a semi-blind SSRF, as responses may not be fully visible but can still impact internal systems. This vulnerability is fixed in 6.8.16."}, {"lang": "es", "value": "OpenCTI es una plataforma de c\u00f3digo abierto para gestionar el conocimiento y los observables de inteligencia de amenazas cibern\u00e9ticas. Antes de la versi\u00f3n 6.8.16, la funci\u00f3n de ingesta de datos de la plataforma OpenCTI acepta URLs proporcionadas por el usuario sin validaci\u00f3n y utiliza el cliente HTTP Axios con su configuraci\u00f3n predeterminada (allowAbsoluteUrls: true). Esto permite a los atacantes elaborar solicitudes a puntos finales arbitrarios, incluidos servicios internos, porque Axios aceptar\u00e1 y procesar\u00e1 URLs absolutas. Esto resulta en un SSRF semi-ciego, ya que las respuestas pueden no ser completamente visibles pero a\u00fan pueden impactar sistemas internos. Esta vulnerabilidad se corrige en la versi\u00f3n 6.8.16."}], "lastModified": "2026-03-19T17:39:31.873", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "83864C1B-398F-4EBC-BFB1-D13968FD7D06", "versionEndExcluding": "6.8.16"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}