CVE-2026-44967
Published: September 13, 2026Last modified: October 5, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack Vector | ADJACENT_NETWORK |
| Attack complexity | HIGH |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Notes
Fixed in 1.27
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | Stream | opentelemetry-cpp | Not affected (1.27.0-r2) |
| Hardened Containers | Stream | opentelemetry-cpp | Not affected (1.27.0-r2) |
References
- https://github.com/open-telemetry/opentelemetry-cpp/issues/3958
- https://github.com/open-telemetry/opentelemetry-cpp/pull/4078
- https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58