opentelemetry-instrumentation Denial of Service vulnerability due to unbound cardinality metrics

SummaryAutoinstrumentation out of the box adds the label httpmethod that has unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. DetailsHTTP method for requests can be easily set by an attacker to be random and long. PoCSend many reques...

PYSEC-2026-1752 opentelemetry-instrumentation Denial of Service vulnerability due to unbound cardinality metrics

Summary Autoinstrumentation out of the box adds the label httpmethod that has unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. Details HTTP method for requests can be easily set by an attacker to be random and long. PoC Send many...