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

Quick assessment

Affected
letta-ai LettaBot
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LettaBot是Letta组织的一款机器学习驱动的智能代理工具。 LettaBot 0.2.0版本存在授权问题漏洞，该漏洞源于src/api/server.ts文件的API Status Route组件缺少身份验证，可能导致远程攻击者进行未授权访问。

CVSS 7.3 · High EPSS 0.69% · P52

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
letta-ai LettaBot 0.2.0 affected
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I. Basic Information for CVE-2026-18990

Vulnerability Information
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Vulnerability Title
letta-ai LettaBot API Status Route server.ts missing authentication
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
LettaBot 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LettaBot是Letta组织的一款机器学习驱动的智能代理工具。 LettaBot 0.2.0版本存在授权问题漏洞，该漏洞源于src/api/server.ts文件的API Status Route组件缺少身份验证，可能导致远程攻击者进行未授权访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
letta-ai LettaBot 0.2.0 cpe:2.3:a:letta-ai:lettabot:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-18990

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III. Intelligence Information for CVE-2026-18990

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Proof of Concept for CVE-2026-18990 (1)

News Coverage for CVE-2026-18990 (1)

Other References for CVE-2026-18990 (3)

IV. Related Vulnerabilities

Same vendor: letta-ai
Same weakness: CWE-306

V. Comments for CVE-2026-18990

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