Four findings from the security audit on PR #641:
FIX 1 (MEDIUM): import_url scheme validation
- Reject non-HTTPS import URLs with 400 before forwarding to CF API.
Prevents SSRF via http://, git://, ssh://, file:// etc.
FIX 2 (MEDIUM): CF 5xx error leakage
- Add cfErrMessage() helper: returns "upstream service error" for CF 5xx
responses and non-CF errors, passes through 4xx messages.
- Applied at all four CF-error response sites (Create, Get, Fork, Token).
FIX 3 (LOW): repo name validation
- Add package-level repoNameRE = ^[a-zA-Z0-9][a-zA-Z0-9_-]{0,62}$
- Validate in Create and Fork handlers when caller supplies an explicit name.
Auto-generated names ("molecule-ws-<id>") are always safe and skip validation.
FIX 4 (LOW): response body size limit in CF client
- Wrap resp.Body with io.LimitReader(1 MB) before json.NewDecoder in do().
Prevents memory exhaustion from a runaway/malicious CF response.
Tests: 16 new tests covering all four fixes (cfErrMessage 4xx/5xx/non-API,
import_url non-HTTPS cases, invalid repo names in Create and Fork).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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