CVE-2026-54688Public exploitNetwork attack vectorHinoki check available

Internal data disclosure via disabled SSRF guard

Published Sep 15, 2026 · Updated Sep 15, 2026

SSRF in mcp-searxng before 1.2.1 allows context-dependent attackers to read internal HTTP resources via web_url_read. The tool passes its caller-supplied URL to the server-side fetch path, while assertUrlAllowed runs only when MCP_HTTP_HARDEN is enabled and that setting defaults to off. Influence over a user- or AI-selected URL is required; successful requests return loopback, private-network, or cloud metadata content into the model context.

CVSS severity6.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

SSRF in mcp-searxng before 1.2.1 allows context-dependent attackers to read internal HTTP resources via web_url_read. The tool passes its caller-supplied URL to the server-side fetch path, while assertUrlAllowed runs only when MCP_HTTP_HARDEN is enabled and that setting defaults to off. Influence over a user- or AI-selected URL is required; successful requests return loopback, private-network, or cloud metadata content into the model context.

The record

CVE
CVE-2026-54688
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Ihor Sokoliuk
Product
mcp-searxng
Classifications
CWE-918, T1552.005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=< 1.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ihor Sokoliuk · mcp-searxngversion=< 1.2.0

Published CVSS scores

6.5Ihor SokoliukCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 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)
T1552.005Cloud Instance Metadata API

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