CVE-2026-54562Public exploitNetwork attack vector

Internal response disclosure via unvalidated remote downloads

Published Jul 15, 2026 · Updated Jul 15, 2026

SSRF in Cloudreve before 4.16.1 allows remote authenticated users to read internal HTTP responses through remote downloads. The POST /api/v4/workflow/download path passes each supplied URL to the assigned downloader without rejecting loopback, private, IPv6-localhost, or redirected internal targets. Reachability requires non-admin membership in a group granted remote-download permission, which default normal users lack; fetched responses are imported into the attacker's files.

CVSS severity6.5
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Cloudreve before 4.16.1 allows remote authenticated users to read internal HTTP responses through remote downloads. The POST /api/v4/workflow/download path passes each supplied URL to the assigned downloader without rejecting loopback, private, IPv6-localhost, or redirected internal targets. Reachability requires non-admin membership in a group granted remote-download permission, which default normal users lack; fetched responses are imported into the attacker's files.

The record

CVE
CVE-2026-54562
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Cloudreve
Product
Cloudreve
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 4.16.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cloudreve · Cloudreveversion=< 4.16.1

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

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Your stack

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