Neotoma: Unauthenticated Inspector/API access via reverse-proxy loopback auth bypass

Description

Neotoma versions starting at v0.6.0 can treat public reverse-proxied requests as local when the app receives them over a loopback socket and no Bearer token is present.

In affected deployments, the REST auth middleware can resolve unauthenticated requests as the local development user, making the hosted Inspector and related API surface reachable without credentials.

Impact: unauthorized access to production data exposed through the Inspector/API on affected deployments.

Affected condition: a public deployment behind a reverse proxy or same-host tunnel that forwards traffic to the Node process over loopback.

Remediation implemented on the main branch: local-request detection now fails closed in production unless loopback trust is explicitly enabled, and forwarded public clients remain remote.

Patched release version is pending; this draft will be updated once the fix is released.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
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Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-05-18 14:20:06 UTC
Updated
2026-06-09 10:30:39 UTC
GitHub reviewed
2026-05-18 14:20:06 UTC
NVD published
2026-05-29

EPSS Score

Score Percentile
0.05% 17.12%

CVSS Scores

Base score Version Severity Vector
6.9 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:L)
Limited confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:N)
No availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.

Identifiers

CWEs

CWE id Name
CWE-288 Authentication Bypass Using an Alternate Path or Channel
CWE-306 Missing Authentication for Critical Function

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
npm neotoma >= 0.6.0, < 0.11.1 0.11.1

References

cvelogic Threat Intelligence