internal/server/http/auth.go

@@ -59,6 +59,9 @@ func (s *Server) authenticateAndSession(w stdhttp.ResponseWriter, r *stdhttp.Req
 	if err := auth.VerifyPassword(u.PasswordHash, password); err != nil {
 		return nil, errInvalidCredentials
 	}
+	if u.DisabledAt != nil {
+		return nil, errInvalidCredentials
+	}
 
 	token, err := auth.NewToken()
 	if err != nil {

internal/server/http/jobs.go

@@ -152,6 +152,12 @@ func (s *Server) requireUser(r *stdhttp.Request) (*store.User, bool) {
 	if err != nil {
 		return nil, false
 	}
+	if u.DisabledAt != nil {
+		// Disabled mid-session — kill the session and reject the
+		// request as if it were unauthenticated.
+		_ = s.deps.Store.DeleteSession(r.Context(), auth.HashToken(c.Value))
+		return nil, false
+	}
 	return u, true
 }
 

internal/server/http/rbac_test.go

@@ -1,10 +1,13 @@
 package http
 
 import (
+	"bytes"
+	"encoding/json"
 	stdhttp "net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
+	"time"
 
 	"gitea.dcglab.co.uk/steve/restic-manager/internal/store"
 )
@@ -95,6 +98,50 @@ func TestRequireRoleUnauthenticated401OnAPI(t *testing.T) {
 	}
 }
 
+func TestRequireRoleRejectsDisabledMidSession(t *testing.T) {
+	t.Parallel()
+	srv, urlBase := newTestServer(t, false)
+	uid := makeUser(t, srv, "victim", store.RoleOperator)
+	cookie := loginAs(t, srv, uid)
+
+	// Disable the user *while their session is still valid*.
+	if err := srv.deps.Store.DisableUser(t.Context(), uid, time.Now().UTC()); err != nil {
+		t.Fatalf("disable: %v", err)
+	}
+
+	req, _ := stdhttp.NewRequest("GET", urlBase+"/api/hosts", nil)
+	req.AddCookie(cookie)
+	res, err := stdhttp.DefaultClient.Do(req)
+	if err != nil {
+		t.Fatalf("GET: %v", err)
+	}
+	defer res.Body.Close()
+	if res.StatusCode != stdhttp.StatusUnauthorized {
+		t.Errorf("status: got %d want 401", res.StatusCode)
+	}
+}
+
+func TestLoginRejectsDisabledUser(t *testing.T) {
+	t.Parallel()
+	srv, urlBase := newTestServer(t, false)
+	uid := makeUser(t, srv, "disabled1", store.RoleOperator)
+	if err := srv.deps.Store.DisableUser(t.Context(), uid, time.Now().UTC()); err != nil {
+		t.Fatalf("disable: %v", err)
+	}
+
+	body, _ := json.Marshal(map[string]string{
+		"username": "disabled1", "password": "test-password",
+	})
+	res, err := stdhttp.Post(urlBase+"/api/auth/login", "application/json", bytes.NewReader(body))
+	if err != nil {
+		t.Fatalf("POST: %v", err)
+	}
+	defer res.Body.Close()
+	if res.StatusCode != stdhttp.StatusUnauthorized {
+		t.Errorf("status: got %d want 401", res.StatusCode)
+	}
+}
+
 func TestAdminBandRejectsOperator(t *testing.T) {
 	t.Parallel()
 	// This test will start asserting 403 once Task B4 mounts /api/users

internal/server/http/ui_handlers.go

@@ -66,6 +66,10 @@ func (s *Server) sessionUser(r *stdhttp.Request) (*ui.User, error) {
 		}
 		return nil, err
 	}
+	if u.DisabledAt != nil {
+		_ = s.deps.Store.DeleteSession(r.Context(), auth.HashToken(c.Value))
+		return nil, nil
+	}
 	return &ui.User{ID: u.ID, Username: u.Username, Role: string(u.Role)}, nil
 }