CVE-2026-44830 Empty API_TOKEN disables authentication on network-reachable HTTP/SSE transport
Attackers on the same network can read, write, or delete memory entries if the API token is unset, enabling persistent prompt injection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44830?
CVE-2026-44830 is a high-severity authentication bypass vulnerability in Dataojitori nocturne_memory, published on 27 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Nocturne Memory is a lightweight, rollbackable, and visual Long-Term Memory Server for MCP Agents. Prior to 2.4.1, when API_TOKEN is unset or empty, the BearerTokenAuthMiddleware bypasses authentication for all HTTP requests. Combined with the default 0.0.0.0 host binding and CORS allow_origins=["*"], operators following the Docker setup without explicitly setting API_TOKEN expose the full Knowledge-Graph read/write API to any LAN-reachable client. An attacker on the same network can read, write, or delete all memory entries — including system://boot and core://* URIs that auto-load into downstream agent sessions, enabling persistent prompt-injection. This vulnerability is fixed in 2.4.1.
Weakness: CWE-306
Which versions are affected by CVE-2026-44830?
How do I fix CVE-2026-44830?
No fix has been published for CVE-2026-44830 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-44830 being exploited?
There is no known exploitation of CVE-2026-44830 in the wild and no public exploit code.
Sources
Also known as GHSA-crr4-xrj9-ww8g.