CVE-2026-29023Network attack vector

Unauthorized API proxying via hard-coded router key

Published Mar 9, 2026 · Updated Mar 9, 2026

Authentication bypass in Keygraph Shannon allows remote attackers to proxy API requests through an exposed router using a public static key. The router configuration embeds shannon-router-key as APIKEY, while Docker Compose publishes TCP port 3456 on every host interface. Router mode must be enabled and the port network-reachable; successful access spends configured provider credentials and exposes proxied request and response data.

CVSS severity6.9
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Keygraph Shannon allows remote attackers to proxy API requests through an exposed router using a public static key. The router configuration embeds shannon-router-key as APIKEY, while Docker Compose publishes TCP port 3456 on every host interface. Router mode must be enabled and the port network-reachable; successful access spends configured provider credentials and exposes proxied request and response data.

The record

CVE
CVE-2026-29023
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
Keygraph
Product
Shannon
Classifications
CWE-798, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 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=0 <commit 023cc95

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Keygraph · Shannonversion=0 <commit 023cc95

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
7.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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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