{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-3677 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-3677 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-3677 is a medium-severity unsafe deserialization vulnerability in lm-sys fastchat, published on 16 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-3677 and fix it if it is affected.\n\nWhat it is: CVE-2025-3677 is a medium-severity unsafe deserialization vulnerability in lm-sys fastchat, published on 16 Apr 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-3677 in the wild and no public exploit code.\n\nAffected product: lm-sys fastchat. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-3677/ (Markdown: https://insights.sbomify.com/CVE-2025-3677/index.md)","id":"CVE-2025-3677","markdown":"https://insights.sbomify.com/CVE-2025-3677/index.md","name":"CVE-2025-3677","record":{"aliases":["GHSA-v32v-5787-25w8"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Python LLM library","requires_auth":"low_privilege","summary":"A local attacker can exploit unsafe deserialization in fastchat's apply_delta.py to execute arbitrary code.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization","id":"CVE-2025-3677","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2025"},"n_packages":0,"n_references":4,"next":{"headline":"PCMan FTP Server HELP Command buffer overflow","id":"CVE-2025-3678"},"packages":[],"prev":{"headline":"xxyopen Novel-Plus books sql injection","id":"CVE-2025-3676"},"products":["fastchat"],"published":"2025-04-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-21","vendors":["lm-sys"]},"summary":"A local attacker can exploit unsafe deserialization in fastchat's apply_delta.py to execute arbitrary code.","url":"https://insights.sbomify.com/CVE-2025-3677/"}