CVE-2026-44967
opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
6th
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.
| CWE | CWE-789 |
| Vendor | open-telemetry |
| Product | opentelemetry-cpp |
| Published | Jun 12, 2026 |
| Last Updated | Jun 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
open-telemetry / opentelemetry-cpp
< 1.27.0
References
github.com: https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj github.com: https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58 github.com: https://github.com/open-telemetry/opentelemetry-cpp/issues/3958 github.com: https://github.com/open-telemetry/opentelemetry-cpp/pull/4078