CVE Explorer
CVE-2026-44967
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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"opentelemetry-cpp","vendor":"open-telemetry","versions":[{"status":"affected","version":"< 1.27.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"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"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-789","description":"CWE-789: Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"name":"https://github.com/open-telemetry/opentelemetry-cpp/issues/3958","tags":["x_refsource_MISC"],"url":"https://github.com/open-telemetry/opentelemetry-cpp/issues/3958"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/cna/references/2
{"name":"https://github.com/open-telemetry/opentelemetry-cpp/pull/4078","tags":["x_refsource_MISC"],"url":"https://github.com/open-telemetry/opentelemetry-cpp/pull/4078"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/cna/references/3
{"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-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/cna/references/0
{"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-go/security/advisories/GHSA-w8rr-5gcm-pp58"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:fdc2a6f240c7c1a56924d74dc58779489504e958943c39a14285b2b9f115afd9 · sha256:94feebb22e229c94… · /containers/adp/0/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.