sglang-router through 0.3.2 Authorization Bypass via Mesh HA Management Routes

{
  "id": "a08aecb1ea598863da1201a880229cb7eac8bcd7eeb7d6a3cc5ef6db093d1fc0",
  "url": "https://osv.dev/vulnerability/CVE-2026-112268",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "sglang-router through 0.3.2 Authorization Bypass via Mesh HA Management Routes",
    "summary": "sglang-router (sgl-model-gateway) through 0.3.2 contains an authorization bypass vulnerability that allows holders of the data-plane API key to access mesh HA management routes because /ha/* endpoints skip control-plane Admin role checks. Attackers can read cluster topology, write gossiped configuration, change global rate limits, and call POST /ha/shutdown to silently dissolve HA coordination.",
    "evidence": "osv:CVE-2026-112268",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-112268",
      "aliases": [
        "CVE-2026-112268"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/sgl-project/sglang",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "37c5899fc2100de1c9afd51a7b1977b2f8185a28"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.3.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.3.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.3.2",
            "v0.3.1.post3",
            "v0.3.1.post2",
            "v0.3.1.post1",
            "v0.3.0",
            "v0.2.15",
            "v0.2.14.post2",
            "v0.2.14.post1",
            "v0.2.14",
            "v0.2.13",
            "v0.2.12",
            "v0.2.11",
            "v0.2.10",
            "v0.2.9.post1",
            "v0.2.9",
            "v0.2.8",
            "v0.2.7",
            "v0.2.6",
            "v0.2.5",
            "v0.2.0",
            "v0.1.24",
            "v0.1.23",
            "v0.1.22",
            "v0.1.21",
            "v0.1.20",
            "v0.1.19",
            "v0.1.18",
            "v0.1.17",
            "v0.1.16",
            "v0.1.15",
            "v0.1.14",
            "v0.1.13",
            "v0.1.12",
            "v0.1.11",
            "v0.1.10",
            "v0.1.9",
            "v0.1.8",
            "v0.1.7",
            "v0.1.6",
            "v0.1.5",
            "v0.1.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112268.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.504352166Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112268.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-112268",
        "https://www.vulncheck.com/advisories/sglang-router-through-0.3.2-authorization-bypass-via-mesh-ha-management-routes",
        "https://github.com/sgl-project/sglang/issues/45006",
        "https://github.com/sgl-project/sglang/pull/45017",
        "https://github.com/sgl-project/sglang",
        "https://github.com/sgl-project/sglang/blob/v0.5.22/sgl-model-gateway/src/server.rs#L641-L675"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112268.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-112268",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 516736,
  "published_at": "2026-10-19T13:55:17.198+00:00"
}