{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:c\\+\\+:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.27.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e0c6c3389bbc0eb1fde87437ec88e222e30958a9"
            }
          ],
          "repo": "https://github.com/open-telemetry/opentelemetry-cpp",
          "type": "GIT"
        },
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:c\\+\\+:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.27.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5661ff0ded32cf1b83f1147dae96ca403c198504"
            }
          ],
          "repo": "https://github.com/open-telemetry/opentelemetry-go",
          "type": "GIT"
        },
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:c\\+\\+:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.27.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "007ae66d4a15c43bea20b382c0fd900c66133328"
            }
          ],
          "repo": "https://github.com/open-telemetry/opentelemetry-go-contrib",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-789"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44967.json"
  },
  "details": "OpenTelemetry-cpp is the C++ implementation of OpenTelemetry. Prior to release 1.27.0, the OTLP HTTP exporters (traces/metrics/logs) read the full HTTP response into an in-memory vector of bytes without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can MITM the exporter connection). This vulnerability is fixed in opentelemetry-cpp release 1.27.0.",
  "id": "CVE-2026-44967",
  "modified": "2026-07-08T05:39:01.114510717Z",
  "published": "2026-06-12T14:52:00.124Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44967.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44967"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/issues/3958"
    },
    {
      "type": "FIX",
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/pull/4078"
    }
  ],
  "related": [
    "GHSA-5qhm-4rfp-qqvj",
    "GHSA-w8rr-5gcm-pp58"
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response"
}