Linkerd

edge-26.4.3Networking & Messaging

Apr 16, 2026Copy link

edge-26.4.3 adds per-pod proxy env var injection via annotation, bumps proxy to v2.349.0, and validates Kubernetes 1.35 compatibility across policy tests.

• enhancementUse proxy-additional-env to inject custom env vars without custom images

  The new `proxy-additional-env` annotation lets you set environment variables on injected proxies at the pod or namespace scope. This is useful for tuning proxy behavior (e.g., log levels, feature flags) in specific workloads without modifying global Helm values or building custom proxy images. Start using it on non-critical workloads first to validate behavior before rolling out broadly.

• enhancementPlan for Kubernetes 1.35 if you're on the upgrade path

  Linkerd's test suite now covers k8s 1.35, including policy tests. If your team is evaluating or scheduling a cluster upgrade to 1.35, this edge release gives you reasonable confidence that core Linkerd functionality and policy enforcement will hold. Run your own smoke tests against a 1.35 staging cluster before committing to a production upgrade.

• securityrustls-webpki patch — verify if you vendor Rust dependencies

  rustls-webpki was bumped to 0.103.11. This library is part of Linkerd's mTLS stack. No CVE is listed, but if your organization audits or vendors Rust dependencies, update your lockfiles and re-run your SBOM scans to stay current.