Six post-code-review fixes, applied before opening the PR per project
workflow (spec-review + code-review both gate the merge):
1. SSRF allowlist on `/mitre/sync`. Host must be in MITRE_ALLOWED_HOSTS
(defaults to `raw.githubusercontent.com`, env-overridable). Closes "admin
holding `mitre.sync` pivots api container at 169.254.169.254 / internal
mirrors" via a typo'd URL. New `MitreSourceForbidden` → 400
`source_forbidden`; checked at the top of `_download()` so it kicks in
before any I/O.
2. `pg_advisory_xact_lock(hashtext('mitre.seed'))` at the top of the seed
transaction. Two concurrent `/mitre/sync` requests now serialise across
the DELETE+INSERT of `mitre_technique_tactics`; previously they could
both wipe the M2M and one would fail the unique constraint on re-insert.
3. Typed SyncResult contract. Pydantic `SyncResultOut` on the Flask side
`model_validate`s the dict before returning — single source of truth
for the response shape, mirrored by a `MitreSyncResult` TS interface
(next commit). The `as Record<string, unknown>` + `as { duration_ms }`
cast in MitrePage is gone.
4. N+1 in dotted sub-technique fallback removed. Built
`{external_id → technique_id}` once at function entry. Currently a
no-op against MITRE official (0 orphans), but a latent footgun for
partial / older bundles.
5. `SETTING_VERSION` cleared explicitly when `source != MITRE_DEFAULT_URL`.
Previously it kept the stale pin label, so `/mitre/status` lied after
a custom-URL re-sync.
6. `/mitre/sync` 500s no longer echo `str(e)` to the client — URLError /
psycopg / Pydantic text now lives in the JSON log only. Public response
stays `{"error": "internal_error"}`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
63b48addc0