CVE-2026-55496Public exploitNetwork attack vector

Authenticated account email disclosure via unfiltered search

Published Jul 31, 2026 · Updated Jul 31, 2026

Information disclosure in Cloudreve before 4.17.0 allows remote authenticated users to read inactive or banned account emails through user search. SearchActive filters email or nickname keywords but omits the StatusActive predicate, and RedactLevelUser then serializes each match with its email address. Any logged-in account can query two-character terms; exposure is limited to email and basic profile metadata, not credentials or account access.

CVSS severity4.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Cloudreve before 4.17.0 allows remote authenticated users to read inactive or banned account emails through user search. SearchActive filters email or nickname keywords but omits the StatusActive predicate, and RedactLevelUser then serializes each match with its email address. Any logged-in account can query two-character terms; exposure is limited to email and basic profile metadata, not credentials or account access.

The record

CVE
CVE-2026-55496
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
Cloudreve
Product
Cloudreve
Classifications
CWE-200, CWE-359, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.17.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cloudreve · Cloudreveversion=4.17.0

Published CVSS scores

4.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-359Exposure of Private Personal Information to an Unauthorized Actor
T1087Account Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo