Charon/docs/reports/qa_final_validation_report.md

QA Final Validation Report — Security Remediation 2026-03-20

Date: 2026-03-20 Auditor: QA Security Auditor (automated) Scope: Code changes and SECURITY.md updates from today's security remediation session

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Summary

Check	Result
Code changes verified	PASS
SECURITY.md structure verified	PASS
Build (go build, go vet)	PASS
Pre-commit hooks	N/A — config missing (see note)
Go tests (mail + docker services)	PASS
Overall	PASS

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Step 1: Code Change Verification

1.1 Dockerfile — Go version bump

Item	Expected	Actual	Result
Line 13	ARG GO_VERSION=1.26.2	ARG GO_VERSION=1.26.2	✅ PASS

1.2 backend/internal/services/mail_service.go — gosec suppression

Item	Expected	Actual	Result
#nosec G203 comment present	Yes	// #nosec G203 -- html/template.Execute auto-escapes all EmailTemplateData fields; this cast prevents double-escaping in the outer layout.	✅ PASS
//nolint:gosec annotation present	Yes	//nolint:gosec // see above	✅ PASS
Comment mentions auto-escaping justification	Yes	Present — cites html/template.Execute auto-escaping and double-escaping prevention	✅ PASS

1.3 backend/internal/services/docker_service_test.go — file permission

Item	Expected	Actual	Result
os.WriteFile permission (~line 231)	0o600	0o600	✅ PASS

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Step 2: SECURITY.md Structure Verification

Check	Expected	Result
Section order	Preamble → Known Vulnerabilities → Patched Vulnerabilities → supporting sections	✅ PASS
CVE-2025-68121 ID field	CVE-2025-68121 (see also CHARON-2025-001)	✅ PASS
CVE-2025-68121 Severity	Critical	✅ PASS
CVE-2026-2673 present in Known Vulnerabilities	Yes	✅ PASS
CVE-2026-2673 Severity	High	✅ PASS (High · 7.5)
CVE-2026-2673 Status	Awaiting Upstream	✅ PASS
CHARON-2025-001 mentions Go 1.25.1 as cluster origin	Yes	✅ PASS
CHARON-2025-001 mentions Go 1.25.6/1.25.7 partial fixes	Yes	✅ PASS
CHARON-2025-001 identifies CVE-2025-68121 as Critical	Yes	✅ PASS
CHARON-2025-001 states resolution requires Go ≥ 1.26.2	Yes	✅ PASS
CHARON-2026-001 present in Patched (not Known)	Yes	✅ PASS
CHARON-2026-001 Resolution links docs/plans/alpine_migration_spec.md	Yes	✅ PASS
CHARON-2026-001 Resolution links docs/security/advisory_2026-02-04_debian_cves_temporary.md	Yes	✅ PASS
CVE-2025-68156 present in Patched	Yes	✅ PASS

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Step 3: Build Verification

Command: cd /projects/Charon/backend && go build ./... && go vet ./...

Result	Details
Exit code	0
Build errors	None
Vet warnings	None
PASS	Clean build and vet with zero diagnostics

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Step 4: Pre-commit Hooks

Command: cd /projects/Charon && pre-commit run --all-files

Result	Details
Exit code	Non-zero (fatal)
Error	InvalidConfigError: .pre-commit-config.yaml is not a file
Hooks executed	0
STATUS: N/A	.pre-commit-config.yaml does not exist in the workspace. No regressions can be inferred; pre-commit infrastructure is absent, not broken by today's changes.

Note: The absence of .pre-commit-config.yaml is a pre-existing infrastructure gap, not a regression introduced by today's session. No hooks (go-vet, golangci-lint, eslint, prettier, gitleaks, etc.) could be evaluated via this pathway. The Go build/vet and test steps below serve as a substitute for the Go-related hooks.

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Step 5: Go Tests for Modified Files

5.1 Mail Service Tests

Command: cd /projects/Charon/backend && go test ./internal/services/... -run "TestMail" -v

Test	Result
TestMailService_SendEmail_CRLFInjection_Comprehensive	PASS
TestMailService_BuildEmail_UndisclosedRecipients	PASS
TestMailService_SendInvite_HTMLTemplateEscaping	PASS
TestMailService_SendInvite_CRLFInjection	PASS
TestMailService_GetSMTPConfig_DBError	PASS
TestMailService_GetSMTPConfig_InvalidPortFallback	PASS
TestMailService_BuildEmail_NilAddressValidation	PASS
TestMailService_sendSSL_DialFailure	PASS
TestMailService_sendSTARTTLS_DialFailure	PASS
TestMailService_TestConnection_StartTLSSuccessWithAuth	PASS
TestMailService_TestConnection_NoneSuccess	PASS
TestMailService_SendEmail_STARTTLSSuccess	PASS
TestMailService_SendEmail_SSLSuccess	PASS
TestMailService_SendEmail_ContextCancelled	PASS
Package result	ok in 0.594s

Two benign teardown warnings appeared (failed to close smtp client/tls conn: use of closed network connection) — expected test-cleanup noise, did not cause failures.

5.2 Docker Service Tests

Command: cd /projects/Charon/backend && go test ./internal/services/... -run "TestBuildLocalDocker" -v

Test	Result
TestBuildLocalDockerUnavailableDetails_PermissionDeniedIncludesGroupHint	PASS
TestBuildLocalDockerUnavailableDetails_MissingSocket	PASS
TestBuildLocalDockerUnavailableDetails_PermissionDeniedSocketGIDInGroups	PASS
TestBuildLocalDockerUnavailableDetails_PermissionDeniedStatFails	PASS
TestBuildLocalDockerUnavailableDetails_ConnectionRefused	PASS
TestBuildLocalDockerUnavailableDetails_GenericError	PASS
TestBuildLocalDockerUnavailableDetails_OsErrNotExist	PASS
TestBuildLocalDockerUnavailableDetails_NonUnixHost	PASS
TestBuildLocalDockerUnavailableDetails_EPERMWithStatFail	PASS
Package result	ok in 0.168s

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Issues / Blocking Findings

None. All verifiable checks passed.

Non-blocking Notes

1. Pre-commit config absent — .pre-commit-config.yaml does not exist; pre-commit hooks cannot run. This is a pre-existing gap, not introduced by today's session. Recommend creating a pre-commit config to enable linting gates.
2. TestDocker pattern produced no matches — the actual docker service test functions follow the naming pattern TestBuildLocalDockerUnavailableDetails_*. The pattern in the original mission brief was too narrow; tests were re-run with the correct pattern and all passed.

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Overall

PASS — All code changes are correctly applied, SECURITY.md structure meets all specified criteria, the backend builds and vets cleanly, and all relevant unit tests pass with zero failures.