CVSS 3.1
3.8 lowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:NCVE-2026-77637
Low (3.8). EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/cloudreve/Cloudreve/v4 4.0.0-20260715070110-bce08f88e9d8.
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.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
- CWE
- CWE-862
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-w89x-c962-c44g | Go | github.com/cloudreve/Cloudreve/v4 | <4.0.0-20260715070110-bce08f88e9d8 | 4.0.0-20260715070110-bce08f88e9d8 |
| GO-2026-6576 | Go | github.com/cloudreve/Cloudreve | all versions | no fix published |
| GO-2026-6576 | Go | github.com/cloudreve/Cloudreve/v3 | all versions | no fix published |
| GO-2026-6576 | Go | github.com/cloudreve/Cloudreve/v4 | <4.0.0-20260715070110-bce08f88e9d8 | 4.0.0-20260715070110-bce08f88e9d8 |