cardinality

OpenTelemetry‑Go Contrib’s HTTP instrumentation contains a subtle but serious denial‑of‑service vector: unbounded cardinality in HTTP labels allows an attacker to exhaust memory through repeated requests that introduce ever‑new label values, a flaw tracked as CVE‑2023‑45142 and fixed in the...

The promhttp vulnerability tracked as CVE-2022-21698 exposed a surprising — yet instructive — weakness at the intersection of observability and availability: by allowing unbounded metric label values to be created from unvalidated HTTP methods, the Prometheus Go client library (client_golang)...