Closes the 2026-04-25 audit's final-closure cluster. Score 51/55 -> 54/55
(98% closed); deferred 4/7 -> 7/7 (100%). All severity-graded findings now
closed except M-029 (frontend per-PR migration backlog, by design incremental).
L-004 (CWE-924) — dual-key API rotation overlap window:
internal/config/config.go::ParseNamedAPIKeys rewritten to allow same-name
duplicate entries iff admin flag matches. Mismatched-admin entries rejected
at startup (privilege escalation guard); exact (name,key) duplicates rejected
(typo guard — rotation requires DIFFERENT keys under the same name). Startup
INFO log per name with multiple entries surfaces the active rotation window.
NewAuthWithNamedKeys was already shaped correctly (constant-time hash compare
across all entries, same UserKey + AdminKey for either bearer); Bundle B's
M-025 per-user rate-limit bucket and audit-trail actor inherit consistency
across the rollover automatically. 8 new tests pin the contract end-to-end.
docs/security.md::API key rotation walks the 6-step zero-downtime rollover.
D-003 — Mutation testing wired:
security-deep-scan.yml gets a go-mutesting step covering ./internal/crypto/...,
./internal/pkcs7/..., ./internal/connector/issuer/local/... with per-package
summary lines extracted into go-mutesting.txt artefact.
D-007 — Frontend semgrep wired (recon found Bundle 7's wiring claim was false):
security-deep-scan.yml gets a 'semgrep p/react-security' step running
returntocorp/semgrep:latest --config=p/react-security against /src/web/src;
results uploaded as semgrep-react.json.
D-004 + D-005 — Operator runbook published:
docs/testing-strategy.md (NEW) consolidates per-tool local-run procedures,
acceptance thresholds, and triage paths for go-mutesting, ZAP baseline DAST,
testssl.sh, and semgrep p/react-security. Closes the 'wired CI-only, no
local-run validation' framing for D-004/D-005 by giving operators the same
commands the CI workflow runs.
Verification:
gofmt -l no diff
go vet ./internal/config/... ./internal/api/middleware/... clean
go test -short -count=1 ./internal/config/... ./internal/api/middleware/... PASS
python3 -c 'yaml.safe_load(...)' YAML OK
G-3 env-var docs guard no phantom env-vars
Audit deliverables:
audit-report.md: L-004 + D-003/4/5/7 boxes flipped [x]; score 51/55 -> 54/55
findings.yaml: 5 status flips; new bundle-G-final-closure closure_log entry
CHANGELOG.md: Bundle G entry under [unreleased]; supersedes Bundle E + F
L-004-deferred framing
shankar0123