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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.

PUBLISHED Reserved 2026-03-27 | Published 2026-03-27 | Updated 2026-03-27 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Improper Neutralization of Directives in Dynamically Evaluated Code

Code Injection

Product status

0.16.4
affected

Timeline

2026-03-27:Advisory disclosed
2026-03-27:VulDB entry created
2026-03-27:VulDB entry last update

Credits

Eric-z (VulDB User) reporter

VulDB coordinator

References

vuldb.com/?id.353842 (VDB-353842 | letta-ai letta Incomplete Fix CVE-2025-6101 ast_parsers.py resolve_type eval injection) vdb-entry technical-description

vuldb.com/?ctiid.353842 (VDB-353842 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.777654 (Submit #777654 | letta-ai letta 0.16.4 CWE-95) third-party-advisory

gist.github.com/YLChen-007/fc09bc447a73bba526c1642d9ce73ca5 exploit

cve.org (CVE-2026-4965)

nvd.nist.gov (CVE-2026-4965)

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