Vulnerability · Published Jul 31, 2026 · Assigned by GitHub_M
CVE-2026-55496Cloudreve: Inactive/banned account emails leaked via GET /api/v4/user/search because SearchActive() omits the active-status predicate
Medium 4.3
In plain English
A medium-severity information exposure in cloudreve from cloudreve. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 or banned accounts. The service calls userClient.SearchActive, but despite its name that method filters only by email/nickname keyword and never adds a StatusActive predicate — while the sibling lookups GetActiveByID and GetActiveByDavAccount, defined a few lines above it, do. Search hits are serialized at RedactLevelUser, which includes the email address. This issue is fixed in version 4.17.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/cloudreve/Cloudreve | no fix listed | GO-2026-6098 |
| Go | github.com/cloudreve/Cloudreve/v3 | no fix listed | GHSA-8r7f-r8hj-r3rv |
| Go | github.com/cloudreve/Cloudreve/v3 | no fix listed | GO-2026-6098 |
| Go | github.com/cloudreve/Cloudreve/v4 | 4.0.0-20260613023921-7e1289d55279 | GHSA-8r7f-r8hj-r3rv |
| Go | github.com/cloudreve/Cloudreve/v4 | 4.0.0-20260613023921-7e1289d55279 | GO-2026-6098 |
Affected products (as reported)
Weakness: CWE-200, CWE-359 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N