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CVE-2026-44967

opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Adjacent network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.21%Up 0.2 points since Jun 12, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response

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.

Record
CVE-2026-44967
CVSS 3.1
5.3 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-02
EUVDEUVD-2026-36466 5.3

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.

Record
EUVD-2026-36466
CVSS 3.1
5.3 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
NVD 5.3

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.

Record
CVE-2026-44967
CVSS 3.1
5.3 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-02
OSVBELL-CVE-2026-44967 5.3

CVE-2026-44967 does not affect BellSoft software

Record
BELL-CVE-2026-44967
CVSS 3.1
5.3 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 5.3

opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response

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.

Record
CVE-2026-44967
CVSS 3.1
5.3 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-789
Updated
2026-11-02
OSVDEBIAN-CVE-2026-44967 5.3

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.

Record
DEBIAN-CVE-2026-44967
CVSS 3.1
5.3 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-44967 5.3

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.

Record
UBUNTU-CVE-2026-44967
CVSS 3.1
5.3 MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVAZL-90080 No score

CVE-2026-44967 affecting package opentelemetry-cpp for versions less than 1.14.2-3

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.

Record
AZL-90080
Updated
2026-11-05

Affected products

Affected packages

Affected packages
PackageAffectedFixed
opentelemetry-cpp
Azure Linux:3
before 1.14.2-3
1.14.2-3
opentelemetry-cpp
Debian:13
All versions, plus listed versions
1.19.0-31.23.0-11.23.0-21.23.0-31.28.0-11.28.0-2
None known
opentelemetry-cpp
Debian:14
before 1.28.0-1, plus listed versions
1.19.0-31.23.0-11.23.0-21.23.0-3
1.28.0-1
opentelemetry-cpp
Ubuntu:25.10
All versions, plus listed versions
1.17.0-3ubuntu11.19.0-3
None known
opentelemetry-cpp
Ubuntu:26.10
All versions, plus listed versions
1.23.0-3build11.23.0-3build2
None known
opentelemetry-cpp
Ubuntu:26.04:LTS
All versions, plus listed versions
1.19.0-31.23.0-21.23.0-31.23.0-3build1
None known

History

History
RecordedChangedSources
factsOSV
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-44967 is a medium vulnerability (CVSS 5.3) in Open-telemetry Opentelemetry-cpp, published June 12, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 10th percentile. Fixed in opentelemetry-cpp 1.14.2-3.

References

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