CVE-2026-45577 Neotoma: Unauthenticated Inspector/API access via reverse-proxy loopback auth bypass
Attackers can bypass authentication to access the Inspector and API when Neotoma is deployed behind a reverse proxy using loopback sockets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45577?
CVE-2026-45577 is a medium-severity authentication bypass vulnerability in markmhendrickson neotoma, published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Neotoma provides versioned records that persist across agent runs. From 0.6.0 to before 0.11.1, Neotoma 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. This vulnerability is fixed in 0.11.1.
Which versions are affected by CVE-2026-45577?
2 open source packages ship an affected version, including neotoma.
| Package | Affected | Fixed in |
|---|---|---|
neotoma npm | From 0.6.0 | 0.11.1 |
neotoma npm | From 0.6.0 | 0.11.1 |
How do I fix CVE-2026-45577?
Upgrade neotoma to 0.11.1 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-45577 being exploited?
There is no known exploitation of CVE-2026-45577 in the wild and no public exploit code.
Sources
Also known as GHSA-5cvp-p7p4-mcx9.