letta-ai LettaBot API Status Route server.ts missing authentication
Priority HIGH 70CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00686 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| letta-ai | LettaBot | 0.2.0 | — | No fix listed | CNA |
- LettaBot Vendorletta-ai Affected 0.2.0 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:letta-ai:lettabot:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:letta-ai:lettabot:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18990
- 2026-10-03 Alias added: GHSA-c8v3-2w4m-9q57
References
More letta-ai vulnerabilities
- TI-2026-76666 Insecure default configuration in Letta exposes API and PostgreSQL CVSS 4.0CRITICAL 9.3
- TI-2026-76667 Letta lets API callers impersonate other users via user_id header CVSS 4.0HIGH 8.6
- TI-2026-76668 Letta tool sandbox exposes server secrets to tool users CVSS 4.0HIGH 7.1
- TI-2025-05511 letta-ai letta interface.py function_message eval injection CVSS 4.0MEDIUM 5.1
Sources
- CVE-2026-18990 · CVE Program
- CVE-2026-18990 · NVD
- FIRST EPSS
- GHSA-c8v3-2w4m-9q57 · GitHub Advisory Database · CC BY 4.0
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