CVE-2026-44967
MEDIUMopentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
Title source: cnaDescription
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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj
X_Refsource_Misc x_refsource_misc
https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58
X_Refsource_Misc x_refsource_misc
https://github.com/open-telemetry/opentelemetry-cpp/issues/3958
X_Refsource_Misc x_refsource_misc
https://github.com/open-telemetry/opentelemetry-cpp/pull/4078
Scores
CVSS v3
5.3
EPSS
0.0021
EPSS Percentile
10.9%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-789
Status
published
Products (1)
open-telemetry/opentelemetry-cpp
< 1.27.0
Published
Jun 12, 2026
Tracked Since
Jun 12, 2026