High · published April 8, 2026
OpenTelemetry-Go is the Go implementation of OpenTelemetry. From 1.36.0 to 1.40.0, multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. This allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit. This vulnerability is fixed in 1.41.0.
| Product | Versions | Fixed in |
|---|---|---|
| opentelemetry/opentelemetry | ≥ 1.36.0, < 1.41.0 | 1.41.0 |