CVE-2026-4965 Details
Description
A vulnerability was detected in letta-ai letta 0.16.4. This issue affects the function resolve_type of the file letta/functions/ast_parsers.py of the component Incomplete Fix CVE-2025-6101. Performing a manipulation results in improper neutralization of directives in dynamically evaluated code. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
A remote code execution vulnerability has been identified in Letta-AI Letta version 0.16.4. This issue arises from an eval injection in the type annotation coercion process, which is an incomplete fix for a previous vulnerability, CVE-2025-6101. The problem is located in the 'resolve_type' function within 'letta/functions/ast_parsers.py'. The vulnerability allows improper neutralization of directives in dynamically evaluated code, and can be exploited remotely without authentication.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 27, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/YLChen-007/fc09bc447a73bba526c1642d9ce73ca5 | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.353842 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.353842 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.777654 | [email protected] | ExploitThird Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
| CWE-95 | Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| letta letta | 0.16.4 |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Initial Analysis | [email protected] |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 27, 2026 | CVE Modified | [email protected] |
| Mar 27, 2026 | New CVE Received | [email protected] |