opentelemetry-java: Quadratic CPU consumption in W3C tracestate parsing

影響: maven:io.opentelemetry:opentelemetry-api <= 1.66.0 → 1.67.0

OpenTelemetry Java's W3C trace-context propagator permits excessive CPU consumption when extracting crafted tracestate headers, potentially leading to denial of service. Regex backtracking causes quadratic parsing time for headers containing long runs of spaces or tabs without a following comma. Impact An unauthenticated attacker whose headers reach W3CTraceContextPropagator.extract() can cause excessive CPU usage through crafted requests. Parsing blocks the calling thread, potentially affectin…

Read on GitHub Advisory Database

On 10/29/2026, 06:07 AM, GitHub Advisory Database published "opentelemetry-java: Quadratic CPU consumption in W3C tracestate parsing" (type: Advisory). Severity is "Medium" (medium). Related technologies: Java. CVE: CVE-2026-118259.