Deserialization in Lm-Sys Fastchat
CVE-2025-3677
A vulnerability classified as critical was found in lm-sys fastchat up to 0.2.36. This vulnerability affects the function split_files/apply_delta_low_cpu_mem of the file fastchat/model/apply_delta.py. The manipulation leads to deserialization. An attack has to be approached locally.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.002 (9.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Lm-sys Fastchat — versions 0.2.0, 0.2.1, 0.2.2
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (issue-tracking)
Frequently asked questions
- What is CVE-2025-3677?
- CVE-2025-3677 is a medium-severity vulnerability in Lm-Sys Fastchat, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2025-04-16.
- How severe is CVE-2025-3677?
- Medium severity. CVSS v3 base score is 5.3 out of 10.