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The MED-11 closure shipped users.deactivated_at + DELETE /api/v1/auth/users/{id}
+ cascade-revoke, but the federated-user soft-delete was reversible: the next
OIDC login under the same (provider, subject) tuple re-minted a session and
re-elevated the user.
Three legs of the chain were severed (each independently CRIT-shaped):
Leg A — postgres/user.go::userColumns omitted `deactivated_at`, so scanUser
never populated User.DeactivatedAt. Every Get / GetByOIDCSubject /
ListAll returned DeactivatedAt = nil regardless of the column value.
Leg B — postgres/user.go::Update SQL omitted `deactivated_at = $X`, so the
handler's `u.DeactivatedAt = now()` mutation was a no-op write at
the SQL level. Even with leg A closed, no row ever flipped.
Leg C — oidc/service.go::upsertUser did not inspect DeactivatedAt on the
existing-user path. Even with legs A + B closed, the OIDC login
would still proceed normally.
The cascade-session-revoke half of the original closure remained correct, but
only for the duration of the user's current cookie. SOC 2 CC6.3 + ISO 27001
A.9.2.6 "user access removal" controls require both immediate revoke AND
persistent block — this fix restores the persistent-block leg.
Closure across layers:
internal/repository/postgres/user.go
- userColumns adds `deactivated_at`
- scanUser reads via sql.NullTime intermediate (column is nullable)
- Create writes deactivated_at explicitly (NULL for new active users;
forward-compat for future seed-data flows that pre-populate the column)
- Update writes deactivated_at on every call; nil DeactivatedAt → NULL
(supports reactivation)
internal/auth/oidc/service.go
- New sentinel ErrUserDeactivated
- upsertUser checks existing.DeactivatedAt != nil BEFORE mutating email /
display_name / last_login_at — preserves last_login_at forensics on
rejected login attempts (defense-in-depth pin against future
"performance optimization" that reorders the gate)
internal/api/handler/auth_session_oidc.go
- classifyOIDCFailure adds typed errors.Is dispatch for ErrUserDeactivated
→ audit category "user_deactivated" (SOC/SIEM observability surface)
internal/api/handler/auth_users.go
- Self-deactivate guard on Deactivate: HTTP 409 + audit row
auth.user_deactivate_self_rejected when caller targets own User row.
Prevents an admin from one-way-door locking themselves out via the
standard handler; break-glass remains the recovery path.
- New Reactivate handler: inverse of Deactivate. Clears DeactivatedAt
via Update; emits auth.user_reactivated audit row. Idempotent on
already-active rows. Sessions revoked at deactivation stay revoked
(cascade irreversible by design — user must complete fresh OIDC
login).
internal/api/router/router.go
- POST /api/v1/auth/users/{id}/reactivate wired with auth.user.deactivate
gate (reactivation is the inverse op, not a separate privilege)
web/src/api/client.ts + web/src/pages/auth/UsersPage.tsx
- authReactivateUser() client function
- Reactivate button on deactivated rows in UsersPage
Regression coverage:
Postgres (testcontainers, skipped under -short):
TestUserRepository_DeactivatedAt_RoundTrip — Create → set DeactivatedAt
→ Update → Get / GetByOIDCSubject / ListAll round-trip the value
TestUserRepository_DeactivatedAt_CreateWritesNullForActive — new active
user reads back DeactivatedAt = nil
TestUserRepository_DeactivatedAt_CreatePersistsPreDeactivated — Create
with non-nil DeactivatedAt round-trips (forward-compat path)
OIDC service:
TestService_HandleCallback_RejectsDeactivatedUser — errors.Is
ErrUserDeactivated; CallbackResult nil; persisted email / last_login_at
/ deactivated_at NOT mutated by the rejected attempt
TestService_HandleCallback_AllowsReactivatedUser — DeactivatedAt = nil
→ happy path resumes
TestService_HandleCallback_DeactivatedUserPreservesForensics —
defense-in-depth pin against future regressions that reorder the
gate-vs-mutation sequence
Classifier:
TestClassifyOIDCFailure extended — typed dispatch + wrapped variant
round-trip through errors.Is
Handler:
TestAuthUsers_Deactivate_RejectsSelfDeactivate — HTTP 409 + audit
row + cascade-revoke NOT fired + row stays active
TestAuthUsers_Deactivate_OtherUser_HappyPath — HTTP 204 + cascade
fires + row soft-deleted
TestAuthUsers_Reactivate_HappyPath / _IdempotentOnActiveUser /
_UnknownID / _MissingID / _UpdateError
Phase 6 verify gate green on the targeted packages: gofmt clean, go vet
clean, go test -short pass across internal/auth/oidc, internal/api/handler,
internal/api/router, internal/repository/postgres, internal/auth/...,
internal/service/..., internal/tlsprobe/..., internal/trustanchor/...,
internal/validation/...
Spec at cowork/auth-bundles-fixes-2026-05-11/02-crit-deactivated-at-enforcement.md
Closure annotation at cowork/auth-bundles-audit-2026-05-10.md MED-11 row.
Operator advisory in CHANGELOG.md v2.1.0 release notes.