{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0cb017f6870a8420695abeb9a4560d39dadc4e2e"
            },
            {
              "fixed": "1dcfa67262ecd56a24f12940f4082549190cb5d1"
            },
            {
              "fixed": "8d8ca17342b3620d3a6d5c1a825145595e7588ff"
            }
          ],
          "repo": "https://github.com/temporalio/tchannel-go",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Temporal",
    "cwe_ids": [
      "CWE-129"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65653.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "0.0.0-20150531204735-8d8ca17342b3"
          },
          {
            "fixed": "1.22.1-0.20260720194454-0cb017f6870a"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "github.com/temporalio/tchannel-go did not reject TChannel call fragments containing checksum metadata but no length-prefixed argument chunks. The fragment reader left its chunk slice empty and then unconditionally selected the first element. A network peer can supply such a malformed call fragment, including as a direct initial call request after completing the standard initialization handshake. On that inbound path, the resulting unrecovered Go slice-bounds panic occurs on a library-created dispatch goroutine and terminates the hosting process. This allows remote denial of service against applications that expose the listener to untrusted peers. The impact is limited to availability; no confidentiality or integrity impact was identified.",
  "id": "CVE-2026-65653",
  "modified": "2026-09-24T03:30:27.236233149Z",
  "published": "2026-09-21T11:36:47.095Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/tchannel-go/blob/8706a1ab5f617efd79dace7ab2d1d80cc1881df0/fragmenting_reader.go#L256-L308"
    },
    {
      "type": "WEB",
      "url": "https://github.com/temporalio/tchannel-go/tree/v1.22.1"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65653.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65653"
    },
    {
      "type": "FIX",
      "url": "https://github.com/temporalio/tchannel-go/commit/0cb017f6870a8420695abeb9a4560d39dadc4e2e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/temporalio/tchannel-go/commit/1dcfa67262ecd56a24f12940f4082549190cb5d1"
    },
    {
      "type": "FIX",
      "url": "https://github.com/temporalio/tchannel-go/commit/8d8ca17342b3620d3a6d5c1a825145595e7588ff"
    },
    {
      "type": "FIX",
      "url": "https://github.com/temporalio/tchannel-go/pull/14"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/temporalio/tchannel-go"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "temporalio/tchannel-go zero-chunk call fragment causes process termination"
}