{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45267", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-11T18:41:13.156Z", "datePublished": "2026-06-01T16:40:18.592Z", "dateUpdated": "2026-06-01T18:12:23.278Z"}, "containers": {"cna": {"title": "Nextcloud: Missing permission check for from submissions", "problemTypes": [{"descriptions": [{"cweId": "CWE-200", "lang": "en", "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-862", "lang": "en", "description": "CWE-862: Missing Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r4gh-f8x6-m55f", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r4gh-f8x6-m55f"}, {"name": "https://github.com/nextcloud/forms/pull/3269", "tags": ["x_refsource_MISC"], "url": "https://github.com/nextcloud/forms/pull/3269"}, {"name": "https://hackerone.com/reports/3628817", "tags": ["x_refsource_MISC"], "url": "https://hackerone.com/reports/3628817"}], "affected": [{"vendor": "nextcloud", "product": "security-advisories", "versions": [{"version": "< 5.2.6", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-01T16:40:18.592Z"}, "descriptions": [{"lang": "en", "value": "Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6."}], "source": {"advisory": "GHSA-r4gh-f8x6-m55f", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-01T18:12:13.355883Z", "id": "CVE-2026-45267", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-01T18:12:23.278Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6."}], "id": "CVE-2026-45267", "lastModified": "2026-06-01T18:14:29.087", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-06-01T17:17:09.963", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/nextcloud/forms/pull/3269"}, {"source": "security-advisories@github.com", "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r4gh-f8x6-m55f"}, {"source": "security-advisories@github.com", "url": "https://hackerone.com/reports/3628817"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Primary"}]}

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