LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-90919",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-14T11:30:59.783Z",
    "dateReserved": "2026-09-14T11:04:23.742Z",
    "datePublished": "2026-09-14T11:30:59.783Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-14T11:30:59.783Z"
      },
      "datePublic": "2026-09-10T00:00:00.000Z",
      "title": "LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization",
      "descriptions": [
        {
          "lang": "en",
          "value": "LightLLM through 1.2.0 contains a remote code execution vulnerability in the Config Server's unauthenticated /visual_register WebSocket endpoint that passes the first client frame directly to pickle.loads(). Attackers can reach the Config Server port and send a malicious serialized payload with a __reduce__ method to execute arbitrary code with Config Server process privileges."
        }
      ],
      "affected": [
        {
          "vendor": "ModelTC",
          "product": "LightLLM",
          "packageName": "LightLLM",
          "repo": "https://github.com/ModelTC/lightllm",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "1.2.0"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Deserialization of Untrusted Data",
              "cweId": "CWE-502",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/ModelTC/LightLLM/issues/1563",
          "name": "GitHub Issue #1563",
          "tags": [
            "issue-tracking"
          ]
        },
        {
          "url": "https://github.com/ModelTC/LightLLM/blob/v1.2.0/lightllm/server/config_server/api_http.py#L79-L86",
          "name": "visual_websocket_endpoint pickle.loads sink at v1.2.0",
          "tags": [
            "technical-description"
          ]
        },
        {
          "url": "https://github.com/ModelTC/lightllm",
          "tags": [
            "product"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-config-server-pickle-deserialization",
          "name": "VulnCheck Advisory: LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jiapeng Li",
          "type": "finder"
        },
        {
          "lang": "en",
          "value": "Jiajia Liu",
          "type": "finder"
        }
      ]
    }
  }
}