CVE-2026-29181
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.
- Published Apr 7, 2026
- CVSS 7.5 high
- 0.9% chance of exploitation in the next 30 days (EPSS)
- Public exploit code is available
- A fix is available
Affected software
- Red Hat Advanced Cluster Management for Kubernetes
- Red Hat Cert Manager support for Red Hat OpenShift release
- Red Hat Cluster Observability Operator
- Red Hat Logging Subsystem for Red Hat OpenShift
- Red Hat Multicluster Engine for Kubernetes
- Red Hat cert-manager Operator for Red Hat OpenShift
- open-telemetry opentelemetry-go