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sec(api): intersect explicit account filters with allowed_accounts on dashboard KPIs - #374
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… dashboard KPIs resolveDashboardAccountScope applied the session's allowed_accounts scope only when the caller supplied no account_ids/account_id filter at all. A restricted session that DID supply an explicit filter got it back unintersected, and calculateCommitmentMetrics had no downstream post-filter (unlike the recommendations half or the inventory handlers), so GET /api/dashboard/summary?account_ids=<out-of-scope-uuid> leaked that account's ActiveCommitments/CommittedMonthly/YTDSavings/CurrentSavings to a scoped view:recommendations user. Move the allowed_accounts intersection into a new intersectAccountFilterScope helper (internal/api/scoping.go) and run every caller-supplied filter through it unconditionally: an unrestricted session's filter passes through unchanged, a restricted session with no filter still gets the full allowed_accounts scope, and a restricted session with an explicit filter now gets the intersection of the two, dropping any out-of-scope account down to the existing "matches nothing" sentinel. Regression test: TestGetDashboardSummary_ScopedUser_ExplicitOutOfScopeAccountIsIgnored (internal/api/handler_dashboard_test.go) asserts a session scoped to acct-A requesting ?account_ids=<acct-B> gets zeroed commitment KPIs and never calls GetActivePurchaseHistory. Verified it fails pre-fix (git stash on the two source files reintroduces the bug; the mock panics with "I don't know what to return" because the pre-fix code calls GetActivePurchaseHistory carrying acct-B's id, which the test deliberately leaves unstubbed) and passes post-fix. A companion test, TestGetDashboardSummary_ScopedUser_ExplicitInScopeAccountStillWorks, guards against overcorrecting the intersection for an account the session does have access to. The audit's A02-006 finding (getHistory applies its LIMIT before the allowed_accounts post-filter, truncating a scoped user's page) is the same unintersected-scope shape but on a different, more invasive code path (the SQL LIMIT/pagination contract in fetchPurchaseHistory) and is left as a residual finding per the issue, noted in the PR body rather than folded into this fix. Closes #99 Co-Authored-By: claude-flow <ruv@ruv.net>
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Included review availability: This review used your included allowance. 1 included review remains after this review. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughDashboard account filters are now intersected with the session’s allowed-account scope. Regression tests cover explicit filters for out-of-scope and in-scope accounts, including a legacy external account ID. ChangesDashboard account scope
Priority: ⬆️ High Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: High Merge Risk: ⚪ Minimal · up to Out-of-scope account filters return no dashboard KPI data. No actionable merge-blocking risk remains. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Inline comments:
Review comments at @internal/api/scoping.go:
- Around line 358-365: Update the intersection loop over
filterExternalIDsByProvider in resolveAllowedAccountScope so the empty provider
key matches each allowed provider containing the ID, adding the result under
that real provider. Keep the existing direct provider-specific matching
unchanged, and avoid retaining an empty-provider entry.
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internal/api/handler_dashboard.gointernal/api/handler_dashboard_test.gointernal/api/scoping.go
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CodeRabbit review on #374: intersectDualColumnScope compared filterExternalIDsByProvider's "" (unknown-provider) bucket only against allowedExternalIDsByProvider[""], which resolveAllowedAccountScope never populates -- it always groups by the account's real provider via resolveAccountFilterIDs. The "" bucket comes from resolveSingleAccountFilterIDs's fallback for a legacy account_id that resolves to a raw external number rather than a known UUID, so a scoped user filtering by an external number belonging to one of their own allowed accounts got zeroed commitment KPIs instead of that account's real data. Fails closed (no leak), but a functional regression from pre-#99-fix behavior. Fix: match a "" entry against every allowed provider's ids and, on a hit, re-group it under that real provider so the downstream dual-column predicate still scopes it correctly. Regression test: TestGetDashboardSummary_ScopedUser_LegacyExternalAccountIDStillMatchesAllowedAccount (internal/api/handler_dashboard_test.go). Verified it fails against the prior intersectDualColumnScope (git stash on scoping.go alone, keeping the new test) -- ActiveCommitments comes back 0 instead of 1 -- and passes with this fix. Co-Authored-By: claude-flow <ruv@ruv.net>
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Independent adversarial review + local verification: MERGE at c11a240. The caller-supplied dashboard account filter is now always intersected with the session's allowed_accounts (unrestricted: pass-through; restricted, no filter: full allowed scope; restricted + filter: intersection; empty intersection: a sentinel that matches nothing, short-circuited before the store). The legacy external-id bucket fix narrows scope, never widens it. All three regression tests have teeth (the out-of-scope test fails at merge-base, the legacy-id test fails at the first commit). go test -race ./internal/api 2219 passed; golangci-lint v2.10.1 0 issues; checks green. Follow-ups filed: inventory's filter still relies on post-filters; GET /api/plans list scoping. |
Summary
Fixes a cross-tenant data leak on the dashboard commitment KPIs: a
restricted (
allowed_accounts-scoped) session that supplied an explicitaccount_ids/account_idfilter got that filter back unintersected withits own scope, so requesting another tenant's account UUID returned that
account's
active_commitments,committed_monthly,ytd_savings, andby_service[].current_savings.Root cause
resolveDashboardAccountScope(internal/api/handler_dashboard.go)resolved the client-supplied
account_ids/account_idparams and returnedthem as-is.
getDashboardSummaryonly substituted the session'sallowed_accountsscope (resolveAllowedAccountScope) when the resolvedfilter was empty — i.e. only on the no-filter path. When the caller
supplied an explicit filter, it flowed straight into
calculateCommitmentMetrics->fetchCommitmentPurchases->GetActivePurchaseHistorywith no intersection againstallowed_accountsand no downstream post-filter (unlike the recommendations half, which is
scoped by
filterDashboardRecommendations, and unlike the inventoryhandlers, which post-filter via
filterPurchaseHistoryByAllowedAccounts).A Read-Only user scoped to
acct-AcallingGET /api/dashboard/summary?account_ids=<acct-B-uuid>received acct-B'scommitment KPIs.
Fix
Added
intersectAccountFilterScope(internal/api/scoping.go), the singlechoke point that narrows a caller-supplied dual-column account filter
(UUIDs + external-ids-by-provider) down to the session's
allowed_accountsscope, unconditionally:
unchanged (previous behavior preserved).
allowed_accountsscope (previous no-filter behavior preserved).the two. An account named in the filter but outside
allowed_accountsisdropped instead of honored. An empty intersection resolves to the
existing non-nil-but-empty "matches nothing" sentinel that
fetchCommitmentPurchasesalready short-circuits on (issue sec(auth): an admin-scoped API key ignores its account and amount constraints on non-strict checks #956), so theKPIs come back zeroed rather than falling through to all-accounts data.
resolveDashboardAccountScopenow runs every resolved filter through thishelper instead of leaving the allowed_accounts fallback to a guard in the
caller. This mirrors the issue's own "structural root cause" note: the
intersection belongs in the scope resolver, not in each caller.
Regression test
TestGetDashboardSummary_ScopedUser_ExplicitOutOfScopeAccountIsIgnored(
internal/api/handler_dashboard_test.go): a session scoped toacct-A(via
GetAllowedAccountsAPI) callsGET /api/dashboard/summary?account_ids=<acct-B-uuid>. Asserts thereturned KPIs are zeroed (
ActiveCommitments == 0,CommittedMonthly == 0,YTDSavings == 0) and, critically, thatGetActivePurchaseHistoryisnever called — the mock deliberately has no
.On(...)stub for it, soif the pre-fix code path reaches it with acct-B's id, testify panics with
"I don't know what to return" instead of silently leaking.
Proved it fails pre-fix:
git stashon just the two source files(
handler_dashboard.go,scoping.go) while keeping the test, re-ran thetest suite — it panics exactly as described above. Restored the fix and
it passes.
Added a companion test,
TestGetDashboardSummary_ScopedUser_ExplicitInScopeAccountStillWorks,proving a scoped session requesting an account it does have access to
still gets that account's real KPIs (guards against over-correcting the
intersection into a blanket deny).
Residual finding not fixed in this PR
The issue's audit appendix also flags A02-006 (low severity):
getHistory(
internal/api/handler_history.go:39-71) applies its SQLLIMITbeforefilterPurchaseHistoryByAllowedAccountsruns, so a scoped user's page can betruncated (not leaked) by other tenants' rows filling the limited page ahead
of the post-filter. This is the same unintersected-scope shape, but fixing
it means folding the allowed-accounts intersection into
resolveHistoryAccountFilter/fetchPurchaseHistory's SQL path, whichchanges when the
GetAllPurchaseHistoryfast-path vsGetPurchaseHistoryFilteredpath is taken for every restricted session(no-filter included) across ~30 existing
getHistorytests -- a materiallylarger blast radius than this dashboard fix, and it interacts with the
LIMIT/no-offset pagination gap the same finding calls out. Leftunfixed here per the issue's own guidance to note it as a residual finding
rather than rush it; recommend a dedicated follow-up PR against issue #99's
A02-006 appendix (or a new issue).
Verification
Go toolchain pinned by
go.mod(go 1.26.6);GOTOOLCHAIN=go1.26.6usedthroughout so the tool versions below match what CI's
setup-goresolves.go build ./...-- cleango vet ./...-- cleango test -race -short ./internal/api/...-- 2218 passed, 0 failedgo mod tidy -diff-- empty (no changes needed)golangci-lint run --timeout=10m ./internal/api/...at the exact CI-pinnedversion (
v2.10.1, built with the repo's owngo1.26.6toolchain toavoid an export-data version mismatch against a locally-cached
go1.27-built binary) -- 0 issues
gocyclo -over 10 -ignore "_test\.go"on the two changed production files-- no functions over the cyclomatic-complexity budget
Docker is hung on this host, so no testcontainers-based DB suite ran
locally; this change touches only in-memory scope-resolution logic exercised
entirely by the mocked
internal/apiunit tests above, and CI's containersuite provides the DB-backed coverage.
Closes #99
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