CVE-2026-52101Public exploitNetwork attack vector

Unauthenticated internal data disclosure via unvalidated upload URL

Published Jul 14, 2026 · Updated Jul 14, 2026

SSRF in uploadRemote in andreimarcu linx-server 1.0 through 2.3.8 allows remote attackers to read internal HTTP responses. The /upload endpoint passes its url parameter to http.Get without filtering internal addresses or metadata endpoints, then saves the response as a public file. The remoteuploads option must be enabled; an empty remoteAuthFile leaves the route unauthenticated, exposing internal service data or cloud metadata.

CVSS severity9.1
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in uploadRemote in andreimarcu linx-server 1.0 through 2.3.8 allows remote attackers to read internal HTTP responses. The /upload endpoint passes its url parameter to http.Get without filtering internal addresses or metadata endpoints, then saves the response as a public file. The remoteuploads option must be enabled; an empty remoteAuthFile leaves the route unauthenticated, exposing internal service data or cloud metadata.

The record

CVE
CVE-2026-52101
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, CWE-200, T1552.005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1552.005Cloud Instance Metadata API
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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