RCE in Letta-Ai Letta
CVE-2025-6101
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (24.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Letta-Ai Letta — versions 0.4.0, 0.4.1
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/letta-ai/letta/issues/2613 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2025-6101?
- CVE-2025-6101 is a medium-severity vulnerability in Letta-Ai Letta, classified under Code Injection. CVSS score: 5.5/10. Published 2025-06-16.
- How severe is CVE-2025-6101?
- Medium severity. CVSS v3 base score is 5.5 out of 10.