CVE-2026-44967

opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response

Published Jun 12, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Opentelemetry opentelemetry
CPEs cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:c\+\+:*:*
Vendors & Products Opentelemetry opentelemetry
Type Values Removed Values Added
First Time appeared Opentelemetry
Opentelemetry opentelemetry-cpp
Vendors & Products Opentelemetry
Opentelemetry opentelemetry-cpp
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
Weaknesses CWE-789
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 12, 2026, 4:10 PM
Reserved
May 8, 2026, 4:23 PM
Status
Analyzed
Published
Jun 12, 2026, 4:16 PM
Modified
Oct 26, 2026, 11:10 AM