{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-77171", "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "state": "PUBLISHED", "assignerShortName": "hackerone", "dateReserved": "2026-08-20T15:00:00.606Z", "datePublished": "2026-10-27T16:15:34.770Z", "dateUpdated": "2026-10-27T16:15:34.770Z"}, "containers": {"cna": {"descriptions": [{"lang": "en", "value": "A public shared collective always allowed recipients of the link to create pages."}], "affected": [{"defaultStatus": "unaffected", "vendor": "Nextcloud", "product": "Collectives", "versions": [{"version": "4.0.0", "status": "affected", "lessThanOrEqual": "4.0.0", "versionType": "semver"}]}], "references": [{"url": "https://hackerone.com/reports/3533697"}], "metrics": [{"cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "baseScore": 3.5, "baseSeverity": "LOW"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-284", "description": "CWE-284 Improper Access Control - Generic"}]}], "credits": [{"lang": "en", "value": "_dha (yoyomiski)", "type": "finder"}], "providerMetadata": {"orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone", "dateUpdated": "2026-10-27T16:15:34.770Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Collectives", "vendor": "Nextcloud", "versions": [{"lessThanOrEqual": "4.0.0", "status": "affected", "version": "4.0.0", "versionType": "semver"}]}], "source": "support@hackerone.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A public shared collective always allowed recipients of the link to create pages."}], "id": "CVE-2026-77171", "lastModified": "2026-10-27T17:17:02.803", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.1, "impactScore": 1.4, "source": "support@hackerone.com", "type": "Secondary"}]}, "published": "2026-10-27T17:17:02.803", "references": [{"source": "support@hackerone.com", "url": "https://hackerone.com/reports/3533697"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "support@hackerone.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Collectives", "source": "cna", "vendor": "Nextcloud"}, "product": "collectives", "vendor": "nextcloud"}], "created": "2026-10-27T17:45:06.457116+00:00", "title": "Public Link Allows Unauthorized Page Creation in Nextcloud Collectives", "updated": "2026-10-27T18:15:06.706211+00:00", "vendors": ["nextcloud", "nextcloud$PRODUCT$collectives"]}