{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55499", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T22:28:27.062Z", "datePublished": "2026-07-31T03:34:33.206Z", "dateUpdated": "2026-07-31T03:34:33.206Z"}, "containers": {"cna": {"title": "Cloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients", "problemTypes": [{"descriptions": [{"cweId": "CWE-863", "lang": "en", "description": "CWE-863: Incorrect Authorization", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8"}, {"name": "https://github.com/cloudreve/cloudreve/commit/0b00dd308f132d6e6e8476857ef79f4865600bbc", "tags": ["x_refsource_MISC"], "url": "https://github.com/cloudreve/cloudreve/commit/0b00dd308f132d6e6e8476857ef79f4865600bbc"}, {"name": "https://github.com/cloudreve/cloudreve/releases/tag/4.17.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/cloudreve/cloudreve/releases/tag/4.17.0"}], "affected": [{"vendor": "cloudreve", "product": "cloudreve", "versions": [{"version": "< 4.17.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-31T03:34:33.206Z"}, "descriptions": [{"lang": "en", "value": "Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner\u2019s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets, event types, and hashed identifiers for unshared sibling files and folders. This issue is fixed in version 4.17.0."}], "source": {"advisory": "GHSA-w8x7-h2px-xmq8", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.17.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "cloudreve", "source": "cna", "vendor": "cloudreve"}, "product": "cloudreve", "vendor": "cloudreve"}], "created": "2026-07-31T05:30:07.230382+00:00", "updated": "2026-07-31T05:30:07.230408+00:00", "vendors": ["cloudreve", "cloudreve$PRODUCT$cloudreve"]}