CVE-2026-18990: letta-ai LettaBot API Status Route server.ts missing authentication

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-06 · updated 2026-10-23
Weakness: CWE-287

Description

A vulnerability was detected in letta-ai LettaBot 0.2.0. Impacted is an unknown function of the file src/api/server.ts of the component API Status Route. The manipulation results in missing authentication. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

letta-ai LettaBot: 0.2.0

References

https://gist.github.com/YLChen-007/2ba2e586f3d16cb368c8dcd6ef680178
https://vuldb.com/cve/CVE-2026-18990
https://vuldb.com/submit/862562
https://vuldb.com/submit/862622
https://vuldb.com/vuln/386359
https://vuldb.com/vuln/386359/cti

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