CVE-2026-101048 Cloudreve before 4.17.0 SSRF via Admin.Read OAuth scope

Cloudreve before 4.17.0 registers the administrative node test endpoints POST /api/v4/admin/node/test and POST /api/v4/admin/node/test/downloader without requiring the Admin.Write OAuth scope, unlike the node create/update/delete routes. An OAuth client that has been authorized by an administrato...

CVE-2026-101056: Incorrect Authorization

Cloudreve before 4.16.1 fails to revalidate share access when restoring cached navigator state from a contexthint UUID. Attackers who previously had valid share access can replay the cached hint to generate signed file URLs for up to 300 seconds after the share is deleted, expires, or reaches zer...

CVE-2026-101048: Incorrect Authorization

Cloudreve before 4.17.0 registers the administrative node test endpoints POST /api/v4/admin/node/test and POST /api/v4/admin/node/test/downloader without requiring the Admin.Write OAuth scope, unlike the node create/update/delete routes. An OAuth client that has been authorized by an administrato...

CVE-2026-101051: Improper Limitation of a Pathname to a Restricted Directory

Cloudreve before 4.16.1 fails to properly sanitize file paths returned by remote downloaders, allowing authenticated users to create files outside the selected destination directory. Attackers can exploit path traversal sequences in downloader metadata to write files to unexpected locations withi...

CVE-2026-79913

creationtimestamp| type| source ---|---|--- 2026-09-22 22:35:08+00:00| published-proof-of-concept| https://github.com/cloudreve/cloudreve/security/advisories/GHSA-jvh5-97xg-v99f 2026-09-23 02:32:16+00:00| seen| https://gist.github.com/alon710/57edfd5f29828b39c794e053b9ab7b82...

Cloudreve: SSRF guard bypass: checkIP does not decode IPv6-transition wrappers (NAT64, IPv4-compatible, 6to4) reaching internal and cloud-metadata addresses

Summary Cloudreve's server-side request forgery guard ValidateExternalURL pkg/request/ssrf.go resolves a user-supplied URL host and rejects it when any resolved IP is a loopback, private, link-local, multicast, unspecified, CGNAT, or the cloud-metadata address. The classification is performed by...

GHSA-JVH5-97XG-V99F Cloudreve: SSRF guard bypass: checkIP does not decode IPv6-transition wrappers (NAT64, IPv4-compatible, 6to4) reaching internal and cloud-metadata addresses

Summary Cloudreve's server-side request forgery guard ValidateExternalURL pkg/request/ssrf.go resolves a user-supplied URL host and rejects it when any resolved IP is a loopback, private, link-local, multicast, unspecified, CGNAT, or the cloud-metadata address. The classification is performed by...

GHSA-W89X-C962-C44G Cloudreve: Privilege Scope Bypass: State-Mutating Admin Operations Accessible via Read-Only OAuth Scope

Summary There is a privilege scope bypass in Cloudreve's admin API where two endpoints that mutate server state are missing the write-scope enforcement that their neighboring endpoints correctly apply. Specifically, the WOPI configuration fetch endpoint and the SMTP test/mail endpoint can both be...

Cloudreve: Privilege Scope Bypass: State-Mutating Admin Operations Accessible via Read-Only OAuth Scope

Summary There is a privilege scope bypass in Cloudreve's admin API where two endpoints that mutate server state are missing the write-scope enforcement that their neighboring endpoints correctly apply. Specifically, the WOPI configuration fetch endpoint and the SMTP test/mail endpoint can both be...

Cloudreve: Storage-quota TOCTOU race allows quota bypass and storage-based denial of service

Summary Cloudreve v4 splits the storage-quota check reading the user's used bytes and comparing them to MaxStorage and the charge incrementing users.storage into two non-atomic steps in the PrepareUpload code path. This creates a Time-of-Check to Time-of-Use TOCTOU race condition. Any authenticat...

GHSA-XJ3H-WWXQ-GFCJ Cloudreve: Storage-quota TOCTOU race allows quota bypass and storage-based denial of service

Summary Cloudreve v4 splits the storage-quota check reading the user's used bytes and comparing them to MaxStorage and the charge incrementing users.storage into two non-atomic steps in the PrepareUpload code path. This creates a Time-of-Check to Time-of-Use TOCTOU race condition. Any authenticat...

CVE-2026-79913

Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, the ValidateExternalURL server-side request forgery guard in pkg/request/ssrf.go passes resolved addresses to checkIP without decoding NAT64, IPv4-compatible, and 6to4 IPv4-in-IPv6 transition forms. An authenticated...

CVE-2026-77633

Cloudreve is a self-hosted file management and sharing system. Prior to 4.18.0, PrepareUpload in pkg/filemanager/fs/dbfs/upload.go checks a stale in-memory user storage value through validateUserCapacity and later applies an unconditional storage charge outside the same quota-enforcing transactio...

CVE-2026-77637

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 RequiredScopestypes.ScopeAdminWrite middleware applied to neighboring state-changing admin tool routes. An OAuth application ...

CVE-2026-77637

Cloudreve , a self-hosted file management and sharing system, is affected by a privilege scope bypass prior to version 4.18.0 . The routes tool.GET("wopi") and tool.POST("mail") in routers/router.go inherit the ScopeAdminRead scope but omit the RequiredScopes(types.ScopeAdminWrite) middleware app...

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

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 RequiredScopestypes.ScopeAdminWrite middleware applied to neighboring state-changing admin tool routes. An OAuth application ...

EUVD-2026-84529

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 RequiredScopestypes.ScopeAdminWrite middleware applied to neighboring state-changing admin tool routes. An OAuth application ...

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

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 RequiredScopestypes.ScopeAdminWrite middleware applied to neighboring state-changing admin tool routes. An OAuth application ...

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

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 RequiredScopestypes.ScopeAdminWrite middleware applied to neighboring state-changing admin tool routes. An OAuth application ...

CVE-2026-77633

Cloudreve , a self-hosted file management and sharing system, contains a TOCTOU race condition in PrepareUpload (pkg/filemanager/fs/dbfs/upload.go) prior to version 4.18.0. The function checks a stale in-memory storage value via validateUserCapacity, then applies an unconditional storage charge o...