extract_params_header copied every request/response header verbatim into
the maps that feed audit entries (requestQuery/responseHeader) and
notification events (req_params). Sensitive headers such as
Authorization and X-Amz-Security-Token were serialized in plaintext and
forwarded to external sinks (webhook/kafka/file), leaking long-lived
credentials.
Redact credential-bearing headers at this single chokepoint: the header
name is kept for correlation, but its value is replaced with the shared
REDACTED_SECRET placeholder. A case-insensitive sensitive-header list
covers authorization, x-amz-security-token, x-amz-content-sha256,
cookie, and set-cookie. Non-sensitive headers keep their existing
behavior.
Refs: https://github.com/rustfs/backlog/issues/963
cxymds