fix(security): MFA OTP bypass + signed image URL ownership (GHSA wave) - #3083
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Re-apply verify_mfa/verify_email_otp_auth separation lost in the prod baseline squash so first-factor OTP sessions cannot bypass MFA RLS gates. Require ownership-scoped prefixes before minting admin signed image URLs. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Included review availability: 3 reviews are currently available. Based on recent review activity, included reviews refill at 5 per hour. 📝 WalkthroughWalkthroughThe PR separates email OTP authentication checks from MFA assurance, registers platform impersonation sessions, and applies ownership validation to image storage paths. App and organization endpoints pass ownership scopes when validating and signing image URLs. ChangesAuthentication and storage security
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟠 High · up to This PR changes MFA authorization, impersonation sessions, and signed image URL handling, but the current head still carries a possible build failure and unresolved security and runtime issues that could weaken MFA enforcement or reject malformed storage URLs incorrectly. Merge should wait for these issues to be fixed or explicitly accepted by the owners. Sequence Diagram(s)sequenceDiagram
participant verify_email_otp
participant verifyEmailOtpAuthSession
participant verify_email_otp_auth
verify_email_otp->>verifyEmailOtpAuthSession: validate OTP session
verifyEmailOtpAuthSession->>verify_email_otp_auth: invoke RPC with access token
verify_email_otp_auth-->>verifyEmailOtpAuthSession: return verification status
verifyEmailOtpAuthSession-->>verify_email_otp: return status or error
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Comment |
Merging this PR will not alter performance
Comparing 
Footnotes
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Ownership checks apply only to org/{id}/ and {userUuid}/ storage paths so
admin signing cannot mint foreign private URLs, while bare legacy icons used
in tests and older rows keep working.
Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Actionable comments posted: 2
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Inline comments:
In `@supabase/functions/_backend/public/app/put.ts`:
- Around line 125-139: Extract the nested icon normalization logic from the main
update flow into a clearly named helper or explicit branching structure,
preserving distinct handling for undefined icons, empty strings, external URLs,
and organization/app-scoped storage paths. Keep the existing validation through
normalizeImagePath and assertAllowedImagePath, along with the invalid_icon_path
error behavior.
In
`@supabase/migrations/20260816150923_split_mfa_session_and_email_otp_checks.sql`:
- Line 4: Update the migration comments and string literals at the affected
locations to keep every line within SQLFluff’s configured 80-character limit,
preserving the existing SQL behavior and message content.
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src/types/supabase.types.tssupabase/functions/_backend/private/verify_email_otp.tssupabase/functions/_backend/public/app/get.tssupabase/functions/_backend/public/app/post.tssupabase/functions/_backend/public/app/put.tssupabase/functions/_backend/public/organization/get.tssupabase/functions/_backend/public/organization/members/get.tssupabase/functions/_backend/public/organization/put.tssupabase/functions/_backend/utils/storage.tssupabase/functions/_backend/utils/supabase.types.tssupabase/migrations/20260816150923_split_mfa_session_and_email_otp_checks.sqlsupabase/tests/58_test_mfa_session_otp_split.sqltests/security-definer-execute-hardening.test.tstests/storage-signed-image-ownership.unit.test.tstests/verify-email-otp-auth-session.unit.test.ts
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Flatten icon path normalization branches and wrap MFA migration comments to satisfy SQLFluff LT05. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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All reported issues were addressed
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Re-trigger cubic
Only extract/sign storage object paths from the configured Supabase origin, and require ownership checks for every foldered path so only legacy root-level bare filenames bypass the gate. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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All reported issues were addressed across 6 files (changes from recent commits).
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Reject storage-shaped URLs when the origin is unknown or the allow-list is empty, instead of silently persisting them as external CDNs. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Catch encoded /storage/v1 routes so foreign-origin checks cannot be bypassed. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Match percent-encoded routes without double-decoding object keys. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Inline comments:
In `@supabase/functions/_backend/utils/storage.ts`:
- Around line 34-40: Update normalizeImagePath so a URIError from
decodeURIComponent is treated as an invalid storage path and returns null
instead of falling through to return the full URL; preserve normal decoding and
add a regression test covering a storage key ending with percent.
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supabase/functions/_backend/public/app/post.tssupabase/functions/_backend/public/app/put.tssupabase/functions/_backend/public/organization/put.tssupabase/functions/_backend/utils/image.tssupabase/functions/_backend/utils/storage.tstests/storage-signed-image-ownership.unit.test.ts
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URIError from decodeURIComponent must not fall through to a raw URL path. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Re-trigger cubic
Keep MFA spoof via log_as session registry only. Remove listed-admin OTP exception, bound impersonation cleanup deletes, and fix typos lint. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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pgTAP aborted after 6/10 tests because INSERT/UPDATE on platform_impersonation_sessions ran as anon after clear_authentication. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
Add admin script to copy root-level images into org/user prefixes and clear placeholders. Reject bare filenames on write and admin signing so ownership is always path-scoped. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Count all legacy path aliases before --delete-source, CAS on raw DB values, and retry app updates when owner_org changes mid-run. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Re-trigger cubic
Rename MFA/OTP migration after main's latest timestamp. Fix bare-image migrate retry to force-refresh copies, clear missing sources, normalize /images/ paths, and count padded aliases before delete-source. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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2 issues found across 2 files (changes from recent commits).
Confidence score: 2/5
- In
scripts/migrate_legacy_bare_image_paths.ts, using offset pagination with--delete-sourceover a live unordered set can skip padded references as rows are removed, leaving some legacy paths unmigrated andcountBareReferencesinaccurate — switch to keyset/cursor pagination (or a stable ordering snapshot) to prevent row-shift misses. - In
scripts/migrate_legacy_bare_image_paths.ts,--delete-sourcecurrently rescans all three tables for every migrated row, creating quadratic behavior that can trigger long runtimes, timeouts, or downstream API overload on large datasets — precompute a normalized reference index once (or otherwise avoid per-row full rescans) before processing.
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<file name="scripts/migrate_legacy_bare_image_paths.ts">
<violation number="1" location="scripts/migrate_legacy_bare_image_paths.ts:377">
P1: With `--delete-source`, this offset-paginates a live, unordered legacy set while concurrent migrations change rows to owned paths. Removed rows shift later pages, so a padded reference can be skipped and `countBareReferences` can return zero. The script can then delete a still-referenced bare object; scan a stable snapshot/keyset or precompute references before writes.
(Based on your team's feedback about normalized legacy image reference counting.) .</violation>
<violation number="2" location="scripts/migrate_legacy_bare_image_paths.ts:396">
P1: With `--delete-source`, this rescans all three tables for every migrated row, making large migrations quadratic and likely causing timeouts or API overload. Build one normalized reference index before processing, or use a server-side aggregate instead of rescanning per row.</violation>
</file>
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Re-trigger cubic
Org-only scope signs logo/ only; app scope signs that app prefix only. Gate metadata cleanup on row ownership. Harden migrate force-overwrite and keep impersonation registry alive across token refresh. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
Avoid per-row rescans and offset-page races for --delete-source by building one keyset-paginated reference map before writes. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
Bare test-icon paths are no longer writable; use external URLs so app create/update suites match the new org/app logo/icon rules. Co-authored-by: Martin DONADIEU <martindonadieu@gmail.com>
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Summary (AI generated)
verify_mfa) from first-factor email OTP (verify_email_otp_auth) so OTP cannot satisfy MFA gates.org/{orgId}/logo/...only; app scope allowsorg/{orgId}/{appId}/...only (no sibling-app or logo cross-sign).cleanStoredImageMetadataon the row's ownership scope so triggers cannot admin-upsert foreign paths.log_asspoof working for MFA-enforced targets viaplatform_impersonation_sessions(fail-closed; registry TTL ≥ 24h so refresh keeps MFA pass).scripts/migrate_legacy_bare_image_paths.ts) and remove the bare-filename signing/write exception; force-overwrite uses upsert;--delete-sourceuses one precomputed keyset-paginated reference index.Motivation (AI generated)
GHSA MFA OTP bypass and signed image path ownership issues needed closing without breaking platform-admin spoof of customers who have 2FA enabled. Broad
org/{orgId}/prefixes still allowed signing sibling app icons or app icons via logo endpoints; that hole is closed.Business Impact (AI generated)
Closes security advisories that could allow session privilege bypass and unauthorized private image access, while preserving internal support spoof for MFA users. After migration + deploy, old root-level icons no longer bypass ownership checks.
Ops: run before / with deploy (AI generated)
Required before this code reaches production, or bare icons stop signing:
Uses
SUPABASE_URL+SUPABASE_SERVICE_ROLE_KEY(default env file./internal/cloudflare/.env.prod). Reports:./tmp/legacy_bare_image_path_results.json,./tmp/legacy_bare_image_path_failures.json.Test Plan (AI generated)
58_test_mfa_session_otp_split.sqlcovers aal1/aal2, OTP split, and impersonation allow/denyadmin:migrate-legacy-bare-image-paths --applyagainst prod/preprod before merge deployGenerated with AI
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New Features
Bug Fixes