{"id":"CVE-2026-55495","title":"Cloudreve is a self-hosted file management and sharing system","summary":"Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the WOPI PUT_RELATIVE handler passes X-WOPI-SuggestedTarget to URI.JoinRaw as a path rather than a filename, allowing slash and dot-dot segments to escape th…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-22"],"vendor":"cloudreve","product":"github.com/cloudreve/Cloudreve/v4","affected":["github.com/cloudreve/Cloudreve/v4 < 4.0.0-20260613023150-7968e50429ef","github.com/cloudreve/Cloudreve/v3 <= 3.0.0-20250225100611-da4e44b77af4"],"patched":["github.com/cloudreve/Cloudreve/v4 4.0.0-20260613023150-7968e50429ef"],"published":"2026-07-31","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:51:43.490","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55495","references":[{"url":"https://github.com/cloudreve/cloudreve/commit/7968e50429efab40ffa8f57fecdfbd5a73d23630","label":"security-advisories@github.com"},{"url":"https://github.com/cloudreve/cloudreve/releases/tag/4.17.0","label":"security-advisories@github.com"},{"url":"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737","label":"security-advisories@github.com"},{"url":"https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-49h3-cwhj-4737"}],"tags":["nvd","ghsa","go"],"epss":0.0026,"epssPercentile":0.18012,"aliases":["GHSA-49h3-cwhj-4737"],"ecosystem":"go","ingestedAt":"2026-07-24T21:39:14.978Z","slug":"CVE-2026-55495","body":"## Overview\n\nCloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the WOPI PUT_RELATIVE handler passes X-WOPI-SuggestedTarget to URI.JoinRaw as a path rather than a filename, allowing slash and dot-dot segments to escape the source file directory and create or conditionally overwrite files elsewhere in the same owner account. This issue is fixed in version 4.17.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-55495)\n\nAffected packages:\n\n- `github.com/cloudreve/Cloudreve/v4 < 4.0.0-20260613023150-7968e50429ef`\n- `github.com/cloudreve/Cloudreve/v3 <= 3.0.0-20250225100611-da4e44b77af4`\n\nPatched in:\n\n- `github.com/cloudreve/Cloudreve/v4 4.0.0-20260613023150-7968e50429ef`\n\nSource: https://github.com/advisories/GHSA-49h3-cwhj-4737","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}