LightLLM through 1.2.0 Missing Authentication on RL Control Routes

{
  "id": "4c4b38fe5e36d8e0e009301bd74ae50f71084fec815b8a2043ce55f7a5d4b8e2",
  "url": "https://osv.dev/vulnerability/CVE-2026-103270",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "LightLLM through 1.2.0 Missing Authentication on RL Control Routes",
    "summary": "LightLLM through 1.2.0 mounts reinforcement learning control routes on the public HTTP API without authentication checks. Unauthenticated attackers can call endpoints like /pause_generation, /abort_request, /flush_cache, and /init_weights_update_group to disrupt inference operations and wedge workers on deployments started with --enable_rl.",
    "evidence": "osv:CVE-2026-103270",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-103270",
      "aliases": [
        "CVE-2026-103270"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/modeltc/lightllm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "65c174ee95ac6a6fd36b18b63d0b33d97e76b770"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.2.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.2.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.2.0",
            "v1.1.0",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103270.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.045774992Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103270.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-103270",
        "https://www.vulncheck.com/advisories/lightllm-through-1.2.0-missing-authentication-on-rl-control-routes",
        "https://github.com/ModelTC/LightLLM/issues/1609",
        "https://github.com/ModelTC/LightLLM",
        "https://github.com/ModelTC/lightllm",
        "https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_http.py#L505-L507",
        "https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_http_rl.py#L51-L139"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-306"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103270.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103270",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506629,
  "published_at": "2026-09-30T14:48:55.071+00:00"
}