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...

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...

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...

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...

CVE-2026-77633 Cloudreve: Storage-quota TOCTOU race allows quota bypass and storage-based denial of service

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...

EUVD-2026-84528

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...

EUVD-2026-84527

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-2026-79913

Cloudreve (self-hosted file management system) has an SSRF guard bypass in the ValidateExternalURL function (pkg/request/ssrf.go) prior to version 4.18.0 . The checkIP validator fails to decode NAT64 , IPv4-compatible , and 6to4 IPv4-in-IPv6 transition address wrappers, causing embedded loopback,...

SUSE CVE-2026-54563

Cloudreve is a self-hosted file management and sharing system. Prior to 4.16.1, a Cloudreve WebDAV account rooted at a configured folder can send paths such as /dav/%2e%2e/outside.txt because stripPrefix in pkg/webdav/webdav.go joins the decoded request suffix to the account root with...

SUSE CVE-2026-55495

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the WOPI PUTRELATIVE 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...

SUSE CVE-2026-55496

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, GET /api/v4/user/search calls SearchActive without adding a StatusActive predicate and serializes matches at RedactLevelUser, allowing any logged-in user to enumerate email addresses and profile metadata for inactive ...

SUSE CVE-2026-55497

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the built-in thumbnail and avatar image decoders limit compressed file size but do not limit decoded pixel dimensions, allowing an authenticated user to submit a small PNG, JPEG, or GIF that triggers an unbounded...