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Six confirmed findings closed (3 MEDIUM, 3 LOW). Tier-1 surfaces from
Pass-1 re-verified non-regressed; this pass deepened the audit on the
auth library, OAuth issuer, and template marketplace.
Za-002 MEDIUM (scrypt cost) — bump SCRYPT_N from 2^14 → 2^17 (131072)
matching current OWASP guidance for password hashing in 2026. Hash
format embeds N (`scrypt$N$salt$hash`), so the existing admin
password at the old cost still verifies — backward-compatible. Also
added explicit maxmem ceilings since Node's default (~32MiB) is
insufficient for the new N.
Za-003 MEDIUM (single-use race) — consumeMagicLink was SELECT-then-
UPDATE; two parallel redemptions could both win and mint two
sessions from the same token. Now uses the same atomic
`UPDATE … WHERE id = ? AND consumedAt IS NULL RETURNING id` pattern
/oauth/token already had — loser of the race gets
invalid_or_expired_token.
Za-004 LOW (membership ordering) — `.orderBy(memberships.createdAt)`
added so when org-invites eventually let a user belong to multiple
orgs, the same one wins every login instead of insertion-order
roulette. Latent-bug pre-empt.
Zb-002 LOW (OAuth register spam) — /oauth/register now per-IP daily
rate-limited at 20/day (well above any legitimate MCP-client
bootstrap pattern). Prevents DB-row spam.
Zc-001 MEDIUM (banned-pattern drift) — three separate copies of
BANNED_PATTERNS had drifted apart. The publish-time scanner in
templates.ts was MISSING the 7 new patterns added in Pass-1
(process.binding, dlopen, .constructor.constructor, vm.runIn*,
globalThis['..']). Single source of truth in @bmm/llm now exports
SHARED_BANNED_PATTERNS; templates.ts composes PUBLISH_BANNED_PATTERNS
= SHARED ∪ code-only-extras (dynamic import, fs.rm, setTimeout-with-
string, process.kill, jailbreak markers).
Zc-002 LOW (N+1) — /v1/templates list was issuing one COUNT(*) per
template (101 queries for a 100-row page). Now one grouped query
with templateId GROUP BY, merged in JS. p95 doesn't degrade with
marketplace growth.
DEFERRED (documented, scoped for next sprint):
Za-001 HIGH — Account takeover via cross-provider email lookup.
Requires schema change (users.primaryProvider). Mitigation in
/settings/account banner planned.
Zb-001 MEDIUM — /oauth/token refresh_token grant: advertised in
AS metadata but unsupported_grant_type. Either implement (~40
LOC) or strip from metadata.
Zc-003 LOW — Admin takedown partial-failure consistency.
Zd-001 IMPROVE — DEK cache invalidation across replicas (single-
instance today).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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