SUSE-SU-2026:23506-1

This update for helm fixes the following issues:

Update to version 3.21.1:

• CVE-2026-37236: github.com/grpc-ecosystem/grpc-gateway/v2/runtime: client can override the HTTP method of a POST request through the X-HTTP-Method-Override header and bypass established access control (bsc#1277949).
• CVE-2026-41178: go.opentelemetry.io/otel/baggage: no rejection of raw-length headers in baggage parsing allows for DoS via oversized inputs (bsc#1276644).
• CVE-2026-48978: oras.land/oras-go/v2/registry/remote/auth: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens (bsc#1270127).
• CVE-2026-50151: oras-go: Credential forwarding via unvalidated Location header during blob upload (bsc#1271660).
• CVE-2026-63308: processing zero-length byte slices in template chart files can trigger an index out-of-range panic (bsc#1272402).
• CVE-2026-84303: github.com/grpc/grpc-go: xDS RBAC HTTP filter implementation issue allows for bypass of authorization policies via mixed-case or canonical-case header matches (bsc#1278270).
• CVE-2026-84304: github.com/grpc/grpc-go: heap memory exhaustion via HTTP/2 DATA frame fragmentation (bsc#1278273).
• CVE-2026-84445: google.golang.org/grpc: DoS via crash due to missing :authority and Host headers in gRPC-Go xDS servers (bsc#1278688).
• gRPC-Go: several issues affecting the xDS RBAC authorization engine and the HTTP/2 transport server implementation (bsc#1276514).