CVE-2026-45155

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{"affected": [{"affectedData": [{"product": "security-advisories", "vendor": "nextcloud", "versions": [{"status": "affected", "version": ">= 32.0.0, < 32.0.7"}, {"status": "affected", "version": ">= 33.0.0, < 33.0.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.7 and 33.0.0 to before 33.0.1, a missing access check on API level allowed to add unknown circles by their ID directly to other circles. Since circle IDs have 62^15 complexity by default this is still unlikely to be executable at will, but if access to an ID was available via another source, memberships could be tracked like this. It is recommended that the Nextcloud Server is upgraded to 32.0.7 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 29.0.16.14, 30.0.17.8, 31.0.14.3, 32.0.7 or 33.0.1"}, {"lang": "es", "value": "Nextcloud es una plataforma de colaboraci\u00f3n de contenido de c\u00f3digo abierto. En Nextcloud Server desde las versiones 32.0.0 hasta antes de la 32.0.7 y 33.0.0 hasta antes de la 33.0.1, una comprobaci\u00f3n de acceso faltante a nivel de API permiti\u00f3 a\u00f1adir c\u00edrculos desconocidos por su ID directamente a otros c\u00edrculos. Dado que los ID de c\u00edrculo tienen una complejidad de 62^15 por defecto, esto sigue siendo poco probable que sea ejecutable a voluntad, pero si el acceso a un ID estuviera disponible a trav\u00e9s de otra fuente, las membres\u00edas podr\u00edan ser rastreadas de esta manera. Se recomienda que el Nextcloud Server se actualice a la 32.0.7 o 33.0.1. Se recomienda que el Nextcloud Enterprise Server se actualice a la 29.0.16.14, 30.0.17.8, 31.0.14.3, 32.0.7 o 33.0.1."}], "id": "CVE-2026-45155", "lastModified": "2026-07-22T07:10:00.107", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 2.6, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45155", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-01T18:09:03.555046Z", "version": "2.0.3"}}]}, "published": "2026-06-01T17:17:09.150", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/nextcloud/circles/pull/2401"}, {"source": "security-advisories@github.com", "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xpgv-grf9-gm7x"}, {"source": "security-advisories@github.com", "url": "https://hackerone.com/reports/3511998"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[32.0.0,32.0.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[33.0.0,33.0.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "security-advisories", "source": "cna", "vendor": "nextcloud"}, "product": "circles", "vendor": "nextcloud"}], "created": "2026-06-01T18:45:34.649434+00:00", "updated": "2026-06-02T20:54:07.301497+00:00", "vendors": ["nextcloud", "nextcloud$PRODUCT$circles"]}