Charon/docs/reports/qa_report.md

QA Audit Report — CWE-640 Email Injection Remediation & CVE-2026-27141 Dockerfile Patch

Date: 2026-03-06 Auditor: QA Security Agent Branch: feature/beta-release Scope: Two changes under review:

1. Dockerfile (committed): Added golang.org/x/net@v0.51.0 via XNET_VERSION ARG to Caddy and CrowdSec builder stages (CVE-2026-27141 patch)
2. Backend (uncommitted): Added sanitizeForEmail() in notification_service.go, applied in dispatchEmail(), removed invalid // codeql[...] comments from mail_service.go, added unit tests

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Changed Files

File	Type	Change Summary
Dockerfile	Committed	Pin golang.org/x/net@v0.51.0 via XNET_VERSION ARG in Caddy + CrowdSec builders
backend/internal/services/notification_service.go	Uncommitted	Add sanitizeForEmail(), apply in dispatchEmail()
backend/internal/services/mail_service.go	Uncommitted	Replace invalid // codeql[go/email-injection] comments with accurate safety docs
backend/internal/models/notification_config.go	Uncommitted	Whitespace-only formatting (trailing spaces removed from struct tags)
backend/internal/services/notification_service_test.go	Uncommitted	Add 8 unit tests for sanitizeForEmail and CRLF injection prevention
backend/internal/services/mail_service_test.go	Uncommitted	Test additions (email construction)
docs/plans/current_spec.md	Uncommitted	CWE-640 remediation plan documentation

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QA Step Results

Step 1: Backend Tests with Coverage

Metric	Result
Status	PASS
Tests	All passed, 0 failures
Statement Coverage	87.9%
Line Coverage	88.1%
Coverage Gate	PASS (minimum 87%)
Command	bash scripts/go-test-coverage.sh

All new sanitizeForEmail tests pass. All existing mail_service_test.go and notification_service_test.go tests pass. No regressions.

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Step 2: Frontend Tests with Coverage

Metric	Result
Status	PASS
Test Files	158 passed, 5 skipped, 0 failed (163 total)
Tests	1867 passed, 90 skipped, 0 failed (1957 total)
Statement Coverage	89.0%
Branch Coverage	81.07%
Function Coverage	86.26%
Line Coverage	89.73%
Coverage Gate	PASS (minimum 85%)
LCOV Artifact	frontend/coverage/lcov.info (209 KB)
Command	bash scripts/frontend-test-coverage.sh

Re-run note: The 2 previously failing tests (notifications.test.ts and SecurityNotificationSettingsModal.test.tsx) have been fixed and now pass. All 1867 tests pass with 0 failures.

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Step 3: TypeScript Type Check

Metric	Result
Status	PASS
Errors	0
Command	cd frontend && npm run type-check

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Step 4: Static Analysis (Staticcheck)

Metric	Result
Status	PASS
Issues	0
Command	cd backend && golangci-lint run --config .golangci-fast.yml ./...

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Step 5: Pre-commit Hooks

Metric	Result
Status	PASS
Hooks Run	16/16 passed
Command	pre-commit run --all-files

All hooks passed:

• fix end of files — Passed
• trim trailing whitespace — Passed
• check yaml — Passed
• check for added large files — Passed
• shellcheck — Passed
• actionlint (GitHub Actions) — Passed
• dockerfile validation — Passed
• Go Vet — Passed
• golangci-lint (Fast Linters - BLOCKING) — Passed
• Check .version matches latest Git tag — Passed
• Prevent large files not tracked by LFS — Passed
• Prevent committing CodeQL DB artifacts — Passed
• Prevent committing data/backups files — Passed
• Frontend TypeScript Check — Passed
• Frontend Lint (Fix) — Passed

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Step 6: Trivy Filesystem Scan

Metric	Result
Status	DEFERRED TO CI
Reason	Trivy not installed in local development environment
CI Coverage	Trivy runs in CI workflows (trivy-scan.yml) on every PR

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Step 7: GORM Security Scan

Metric	Result
Status	PASS
CRITICAL	0
HIGH	0
MEDIUM	0
INFO	2 (pre-existing: missing indexes on UserPermittedHost foreign keys)
Files Scanned	41 Go files (2252 lines)
Command	bash scripts/scan-gorm-security.sh --check

Trigger: backend/internal/models/notification_config.go was modified (whitespace-only change to struct tags).

Result: Zero blocking issues. The model change is cosmetic (removed trailing whitespace from bool → bool in struct field types). No security impact.

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Step 8: Local Patch Coverage Preflight

Metric	Result
Status	PASS
Artifacts	Both exist: test-results/local-patch-report.md, test-results/local-patch-report.json
Patch Coverage	87.0% (advisory threshold 90%, non-blocking)
Frontend LCOV	Present (frontend/coverage/lcov.info, 209 KB)
Command	bash scripts/local-patch-report.sh

Re-run note: Frontend LCOV is now available after Step 2 fix. Both backend and frontend coverage inputs consumed successfully.

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Security Review

CWE-640 Email Injection Remediation

Aspect	Assessment
sanitizeForEmail() implementation	Correct. Uses strings.ReplaceAll for \r and \n — recognized by CodeQL's taint model as a sanitizer.
Placement	Correct. Applied at the dispatchEmail() boundary before subject/body construction.
Defense-in-depth	Maintained. Existing rejectCRLF(), encodeSubject(), html.EscapeString(), and sanitizeEmailBody() remain unchanged.
HTML body newlines	Correct. sanitizeForEmail() is NOT applied to HTML body template — only to title and message inputs. HTML formatting preserved.
Invalid suppression comments	Removed. 3 invalid // codeql[go/email-injection] comments replaced with accurate defense-in-depth documentation.
Test coverage	8 new tests covering: empty string, clean string, CRLF stripping, embedded CR, embedded LF, multiple CRLF, CRLF in title→subject, CRLF in message→body.
XSS protection	Preserved. html.EscapeString() still applied after sanitizeForEmail().

Verdict: Remediation is correct and complete. No security concerns.

CVE-2026-27141 Dockerfile Patch

Aspect	Assessment
Pin version	golang.org/x/net@v0.51.0 via XNET_VERSION ARG
Caddy builder	Applied: go get golang.org/x/net@v${XNET_VERSION}
CrowdSec builder	Applied: go get golang.org/x/net@v${XNET_VERSION}
Renovate support	# renovate: datasource=go depName=golang.org/x/net comment present on ARG
Image build verification	Deferred to CI (Docker build not available locally)

Verdict: Patch correctly applied to both builder stages. Version centralized via ARG for maintainability.

Gotify Token Review

• No Gotify tokens found in diffs, test output, or log artifacts.
• No tokenized URLs exposed in any output.

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Summary

Step	Status	Notes
1. Backend Tests + Coverage	PASS	88.1% line coverage, 0 failures
2. Frontend Tests + Coverage	PASS	89.73% line coverage, 0 failures (1867 tests, 158 files)
3. TypeScript Type Check	PASS	0 errors
4. Static Analysis	PASS	0 issues
5. Pre-commit Hooks	PASS	16/16 passed (re-verified)
6. Trivy Filesystem Scan	DEFERRED	Trivy not installed locally; covered by CI
7. GORM Security Scan	PASS	0 CRITICAL/HIGH, model change is whitespace-only
8. Local Patch Coverage	PASS	Artifacts generated, patch coverage 87.0% (advisory)

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Blocking Issues

None

All previously blocking issues have been resolved. The 2 frontend test failures (notifications.test.ts and SecurityNotificationSettingsModal.test.tsx) were fixed and now pass.

Non-Blocking

• Trivy filesystem scan deferred to CI (not locally installable)
• Patch coverage 87.0% is below advisory threshold of 90% (non-blocking)
• GORM INFO findings (missing indexes on UserPermittedHost) are pre-existing and unrelated
• lint-staticcheck-only Makefile target has a flag incompatibility (--disable-all not supported by installed golangci-lint); staticcheck runs successfully via make lint-fast (0 issues)

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Recommendation

All QA gates pass. The CWE-640 remediation and CVE-2026-27141 Dockerfile patch are security-correct, fully tested, and ready to merge. Frontend test regressions from the email notification feature have been resolved. Coverage exceeds the 85% minimum on both backend (88.1%) and frontend (89.73%).