CVE-2025-6101: letta-ai letta interface.py function_message eval injection

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-16 · updated 2026-06-17
Weakness: CWE-94

Description

A vulnerability classified as critical has been found in letta-ai letta up to 0.4.1. Affected is the function function_message of the file letta/letta/interface.py. The manipulation of the argument function_name/function_args leads to improper neutralization of directives in dynamically evaluated code. The exploit has been disclosed to the public and may be used.

Affected products

letta-ai letta: 0.4.0, 0.4.1

References

https://github.com/letta-ai/letta/issues/2613
https://vuldb.com/?ctiid.312570
https://vuldb.com/?id.312570
https://vuldb.com/?submit.590528

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