A vulnerability in the OpenTelemetry Python Jaeger propagator (opentelemetry-propagator-jaeger) prior to version 1.45.0 allows unbounded memory allocation when processing inbound 'uberctx-*' baggage headers. This can lead to increased CPU and memory usage per request, potentially causing denial-of-service conditions. The issue affects deployments that enable the Jaeger propagator and accept untrusted inbound propagation headers, especially where transport-level limits are absent or set higher than baggage limits. The vulnerability does not expose or modify telemetry data nor allow code execution. It is mitigated by upgrading to version 1.45.0 or later, which enforces limits on baggage extraction.