CVE-2026-55496 Cloudreve: Information Exposure in `GET /api/v4/user/search`: `SearchActive` omits the active-status predicate, leaking inactive/banned account emails
Logged-in users can enumerate email addresses and profile metadata of inactive or banned accounts due to a missing status filter in the user search API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55496?
CVE-2026-55496 is a medium-severity vulnerability in cloudreve, published on 31 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Which versions are affected by CVE-2026-55496?
7 open source packages ship an affected version, including github.com/cloudreve/Cloudreve/v3, github.com/cloudreve/Cloudreve and github.com/cloudreve/Cloudreve/v4.
| Package | Affected | Fixed in |
|---|---|---|
github.com/cloudreve/Cloudreve/v3 Go | All versions | None |
github.com/cloudreve/Cloudreve/v3 Go | All versions to 3.0.0-20250225100611-da4e44b77af4 | None |
github.com/cloudreve/Cloudreve/v3 Go | All versions to 3.0.0-20250225100611-da4e44b77af4 | None |
github.com/cloudreve/Cloudreve Go | All versions | None |
github.com/cloudreve/Cloudreve/v4 Go | All versions | 4.0.0-20260613023921-7e1289d55279 |
github.com/cloudreve/Cloudreve/v4 Go | All versions | 4.0.0-20260613023921-7e1289d55279 |
1 more packages
github.com/cloudreve/Cloudreve/v4 Go | All versions | 4.0.0-20260613023921-7e1289d55279 |
How do I fix CVE-2026-55496?
Upgrade to a fixed version.
Is CVE-2026-55496 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55496 exists.
Sources
Also known as GHSA-8r7f-r8hj-r3rv, GO-2026-6098.