Vulnerability · Published Jun 12, 2026 · Assigned by GitHub_M
CVE-2026-44967opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response
Medium 5.3
In plain English
A medium-severity security flaw in opentelemetry-cpp from open-telemetry. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | opentelemetry-cpp | no fix listed | DEBIAN-CVE-2026-44967 |
| Debian:14 | opentelemetry-cpp | 1.28.0-1 | DEBIAN-CVE-2026-44967 |
| Ubuntu:25.10 | opentelemetry-cpp | no fix listed | UBUNTU-CVE-2026-44967 |
| Ubuntu:26.04:LTS | opentelemetry-cpp | no fix listed | UBUNTU-CVE-2026-44967 |
| Ubuntu:26.10 | opentelemetry-cpp | no fix listed | UBUNTU-CVE-2026-44967 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| open-telemetry | opentelemetry-cpp | < 1.27.0 |
Weakness: CWE-789 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj x_refsource_CONFIRM
- https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58 x_refsource_MISC
- https://github.com/open-telemetry/opentelemetry-cpp/issues/3958 x_refsource_MISC
- https://github.com/open-telemetry/opentelemetry-cpp/pull/4078 x_refsource_MISC