{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:kvcache-ai:ktransformers:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.5.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "db9326302babfdc408dfd454d06aeecdbb91ea9a"
            }
          ],
          "repo": "https://github.com/kvcache-ai/ktransformers",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-502"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26210.json"
  },
  "details": "KTransformers through 0.5.3 contains an unsafe deserialization vulnerability in the balance_serve backend mode where the scheduler RPC server binds a ZMQ ROUTER socket to all interfaces with no authentication and deserializes incoming messages using pickle.loads() without validation. Attackers can send a crafted pickle payload to the exposed ZMQ socket to execute arbitrary code on the server with the privileges of the ktransformers process.",
  "id": "CVE-2026-26210",
  "modified": "2026-07-15T01:49:09.210740705Z",
  "published": "2026-04-23T21:24:48.641Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26210.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26210"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/ktransformers-unsafe-deserialization-rce-via-balance-serve"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/kvcache-ai/ktransformers/pull/1944"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kvcache-ai/ktransformers"
    },
    {
      "type": "EVIDENCE",
      "url": "https://chocapikk.com/posts/2026/ktransformers-pickle-rce/"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "KTransformers Unsafe Deserialization RCE via balance_serve"
}