CVE-2026-44015Public exploitNetwork attack vector

Authenticated SSRF via unrestricted cluster node URLs

Published May 12, 2026 · Updated May 12, 2026

Server-side request forgery in Nginx UI 2.3.4 and earlier allows remote authenticated users to access internal services via cluster nodes. The Proxy middleware in internal/middleware/proxy.go trusts each configured node URL and forwards X-Node-ID requests without blocking loopback, private, or metadata addresses. Any authenticated account can read the node secret, register an arbitrary destination, and read responses or probe ports across the server's reachable networks.

CVSS severity8.5
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Nginx UI 2.3.4 and earlier allows remote authenticated users to access internal services via cluster nodes. The Proxy middleware in internal/middleware/proxy.go trusts each configured node URL and forwards X-Node-ID requests without blocking loopback, private, or metadata addresses. Any authenticated account can read the node secret, register an arbitrary destination, and read responses or probe ports across the server's reachable networks.

The record

CVE
CVE-2026-44015
Published
May 12, 2026
Updated
May 12, 2026
Vendor
0xJacky
Product
Nginx UI
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=<= 2.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

0xJacky · Nginx UIversion=<= 2.3.4

Published CVSS scores

9.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/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-918Server-Side Request Forgery (SSRF)
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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