{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.2.1"
              },
              {
                "last_affected": "0.2.1"
              },
              {
                "introduced": "0.2.3"
              },
              {
                "last_affected": "0.2.3"
              },
              {
                "introduced": "0.2.5"
              },
              {
                "last_affected": "0.2.5"
              },
              {
                "introduced": "0.2.9"
              },
              {
                "last_affected": "0.2.9"
              },
              {
                "introduced": "0.2.14"
              },
              {
                "last_affected": "0.2.14"
              },
              {
                "introduced": "0.2.18"
              },
              {
                "last_affected": "0.2.18"
              },
              {
                "introduced": "0.2.21"
              },
              {
                "last_affected": "0.2.21"
              },
              {
                "introduced": "0.2.22"
              },
              {
                "last_affected": "0.2.22"
              },
              {
                "introduced": "0.2.23"
              },
              {
                "last_affected": "0.2.23"
              },
              {
                "introduced": "0.2.24"
              },
              {
                "last_affected": "0.2.24"
              },
              {
                "introduced": "0.2.25"
              },
              {
                "last_affected": "0.2.25"
              },
              {
                "introduced": "0.2.26"
              },
              {
                "last_affected": "0.2.26"
              },
              {
                "introduced": "0.2.27"
              },
              {
                "last_affected": "0.2.27"
              },
              {
                "introduced": "0.2.28"
              },
              {
                "last_affected": "0.2.28"
              },
              {
                "introduced": "0.2.29"
              },
              {
                "last_affected": "0.2.29"
              },
              {
                "introduced": "0.2.30"
              },
              {
                "last_affected": "0.2.30"
              },
              {
                "introduced": "0.2.31"
              },
              {
                "last_affected": "0.2.31"
              },
              {
                "introduced": "0.2.32"
              },
              {
                "last_affected": "0.2.32"
              },
              {
                "introduced": "0.2.33"
              },
              {
                "last_affected": "0.2.33"
              },
              {
                "introduced": "0.2.34"
              },
              {
                "last_affected": "0.2.34"
              },
              {
                "introduced": "0.2.35"
              },
              {
                "last_affected": "0.2.35"
              },
              {
                "introduced": "0.2.36"
              },
              {
                "last_affected": "0.2.36"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "074f0b18155a81158dacbcba7db68807d14cb471"
            },
            {
              "last_affected": "b21d0f780ca4472a13714262a0790f2ee1ade659"
            }
          ],
          "repo": "https://github.com/lm-sys/fastchat",
          "type": "GIT"
        }
      ],
      "versions": [
        "0.2.1",
        "0.2.14",
        "0.2.18",
        "0.2.21",
        "0.2.22",
        "0.2.23",
        "0.2.24",
        "0.2.25",
        "0.2.26",
        "0.2.27",
        "0.2.28",
        "0.2.29",
        "0.2.3",
        "0.2.30",
        "0.2.31",
        "0.2.32",
        "0.2.33",
        "0.2.34",
        "0.2.35",
        "0.2.36",
        "0.2.5",
        "0.2.9"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulDB",
    "cwe_ids": [
      "CWE-20",
      "CWE-502"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3677.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "0.2.0"
          },
          {
            "last_affected": "0.2.0"
          },
          {
            "introduced": "0.2.2"
          },
          {
            "last_affected": "0.2.2"
          },
          {
            "introduced": "0.2.4"
          },
          {
            "last_affected": "0.2.4"
          },
          {
            "introduced": "0.2.6"
          },
          {
            "last_affected": "0.2.6"
          },
          {
            "introduced": "0.2.7"
          },
          {
            "last_affected": "0.2.7"
          },
          {
            "introduced": "0.2.8"
          },
          {
            "last_affected": "0.2.8"
          },
          {
            "introduced": "0.2.10"
          },
          {
            "last_affected": "0.2.10"
          },
          {
            "introduced": "0.2.11"
          },
          {
            "last_affected": "0.2.11"
          },
          {
            "introduced": "0.2.12"
          },
          {
            "last_affected": "0.2.12"
          },
          {
            "introduced": "0.2.13"
          },
          {
            "last_affected": "0.2.13"
          },
          {
            "introduced": "0.2.15"
          },
          {
            "last_affected": "0.2.15"
          },
          {
            "introduced": "0.2.16"
          },
          {
            "last_affected": "0.2.16"
          },
          {
            "introduced": "0.2.17"
          },
          {
            "last_affected": "0.2.17"
          },
          {
            "introduced": "0.2.19"
          },
          {
            "last_affected": "0.2.19"
          },
          {
            "introduced": "0.2.20"
          },
          {
            "last_affected": "0.2.20"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "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.",
  "id": "CVE-2025-3677",
  "modified": "2026-08-12T03:51:24.529728566Z",
  "published": "2025-04-16T08:31:04.475Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/3xxx/CVE-2025-3677.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-3677"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/?id.304966"
    },
    {
      "type": "ADVISORY",
      "url": "https://vuldb.com/?submit.552755"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/lm-sys/FastChat/issues/3713"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/?ctiid.304966"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "lm-sys fastchat apply_delta.py apply_delta_low_cpu_mem deserialization"
}