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CVE-2026-77637— Cloudreve: Privilege Scope Bypass: State-Mutating Admin Operations Accessible via Read-Only OAuth Scope

一分钟漏洞结论

影响对象
cloudreve cloudreve
利用判断
尚无明确在野利用证据,仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本;无法立即升级时,限制受影响服务暴露并加强监测。

Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, tool.GET("wopi") and tool.POST("mail") in routers/router.go inherit ScopeAdminRead but omit the RequiredScopes(types.ScopeAdminWrite) middleware applied to neighboring state-changi

CVSS 3.8 · Low
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一、 漏洞 CVE-2026-77637 基础信息

漏洞信息

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Vulnerability Title
Cloudreve: Privilege Scope Bypass: State-Mutating Admin Operations Accessible via Read-Only OAuth Scope
来源: CVE Program / CVE List V5
Vulnerability Description
Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, tool.GET("wopi") and tool.POST("mail") in routers/router.go inherit ScopeAdminRead but omit the RequiredScopes(types.ScopeAdminWrite) middleware applied to neighboring state-changing admin tool routes. An OAuth application or API key limited to Admin.Read can therefore probe configured WOPI service endpoints and send arbitrary test email through the server SMTP configuration, exceeding the token's intended read-only authorization boundary. This issue is fixed in version 4.18.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
cloudreve cloudreve < 4.18.0 -

二、漏洞 CVE-2026-77637 的公开POC

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三、漏洞 CVE-2026-77637 的情报信息

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CVE-2026-77637 补丁与修复 (1)

CVE-2026-77637 其他参考 (2)

同批安全公告 · cloudreve · 2026-09-22 · 共 3 条

CVE-2026-77633 7.1 HIGH Cloudreve: Storage-quota TOCTOU race allows quota bypass and storage-based denial of servi
CVE-2026-79913 6.5 MEDIUM Cloudreve: SSRF guard bypass: checkIP does not decode IPv6-transition wrappers (NAT64, IPv

IV. Related Vulnerabilities

V. Comments for CVE-2026-77637

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