{"id":"CVE-2026-44967","state":"PUBLISHED","title":"opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response","description":"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.","publishedAt":"2026-06-12T14:52:00.124Z","updatedAt":"2026-06-12T16:10:48.362Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["open-telemetry opentelemetry-cpp"],"affected":[{"vendor":"open-telemetry","product":"opentelemetry-cpp","versions":[{"version":"< 1.27.0","status":"affected"}]}],"references":["https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj","https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58","https://github.com/open-telemetry/opentelemetry-cpp/issues/3958","https://github.com/open-telemetry/opentelemetry-cpp/pull/4078"],"weaknesses":["CWE-789"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/44xxx/CVE-2026-44967.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44967","state":"PUBLISHED","datePublished":"2026-06-12T14:52:00.124Z","dateUpdated":"2026-06-12T16:10:48.362Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-08T16:23:33.263Z"},"containers":{"cna":{"title":"opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"open-telemetry","product":"opentelemetry-cpp","versions":[{"version":"< 1.27.0","status":"affected"}]}],"references":[{"url":"https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj","name":"https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58","name":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58","tags":["x_refsource_MISC"]},{"url":"https://github.com/open-telemetry/opentelemetry-cpp/issues/3958","name":"https://github.com/open-telemetry/opentelemetry-cpp/issues/3958","tags":["x_refsource_MISC"]},{"url":"https://github.com/open-telemetry/opentelemetry-cpp/pull/4078","name":"https://github.com/open-telemetry/opentelemetry-cpp/pull/4078","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-789","lang":"en","description":"CWE-789: Memory Allocation with Excessive Size Value","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-12T14:52:00.124Z"},"source":{"advisory":"GHSA-5qhm-4rfp-qqvj","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-12T16:10:44.803865Z","id":"CVE-2026-44967","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-12T16:10:48.362Z"}}]}}}