CVE-2023-47108 — OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemet

OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. Starting in version 0.37.0 and prior to version 0.46.0, the grpc Unary Server Interceptor out of the box adds labels `net.peer.sock.addr` and `net.peer.sock.port` that have unbound cardinality.

01What is this vulnerability?

OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. Starting in version 0.37.0 and prior to version 0.46.0, the grpc Unary Server Interceptor out of the box adds labels `net.peer.sock.addr` and `net.peer.sock.port` that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. An attacker can easily…

02Affected products

Vendor	Product	Versions
open-telemetry	opentelemetry	go-contrib — >= 0.37.0, < 0.46.0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-11-10T18:31:33.730Z
• Last modified: 2025-10-28T18:22:47.393Z

09References

• github.com — https://github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/G…
• github.com — https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4322
• github.com — https://github.com/open-telemetry/opentelemetry-go-contrib/commit/04c5dcbb5b35f1…
• github.com — https://github.com/open-telemetry/opentelemetry-go-contrib/commit/b44dfc9092b157…
• github.com — https://github.com/open-telemetry/opentelemetry-go-contrib/blob/9d4eb7e7706038b0…
• github.com — https://github.com/open-telemetry/opentelemetry-go-contrib/blob/instrumentation/…
• pkg.go.dev — https://pkg.go.dev/go.opentelemetry.io/otel/metric/noop#NewMeterProvider