Can Agents Run It? · evidence — Issue 1: Supabase

tencent/hy3 · d1_rls_owner · rep 3

pass
model
tencent/hy3
task
d1_rls_owner
rep
3
day
1
steps
16
tokens
57,061
est. cost
$0.017
agent time
89s
wave
s4c
started
2026-07-26T02:03:31Z

The task as the agent received it

You have operator access to a hosted Supabase project. Credentials are in environment variables: SUPABASE_URL, SUPABASE_PROJECT_REF, SUPABASE_ANON_KEY, SUPABASE_SERVICE_ROLE_KEY, SUPABASE_DB_URL, SUPABASE_DB_PASSWORD. The project has a public.notes table (id, user_id references auth.users, title, body) that currently exposes every user's notes to anyone through the REST API. Lock it down to owner-only access: - an authenticated user must be able to read, insert, update and delete ONLY rows where user_id equals their own auth user id; - a user must NOT be able to insert a row with someone else's user_id; - anonymous (anon key only) requests must see no rows; - legitimate owners must keep working through the REST API — do not break their access path. Two existing users for your own testing: alice@cari.dev / Passw0rd-alice-42 and bob@cari.dev / Passw0rd-bob-58. Each currently owns 2 notes. Do not modify the data.

What it ran — 16 commands

#1exit 0
echo "SUPABASE_URL=$SUPABASE_URL"; echo "SUPABASE_PROJECT_REF=$SUPABASE_PROJECT_REF"; echo "SUPABASE_ANON_KEY present: $([ -n "$SUPABASE_ANON_KEY" ] && echo yes)"; echo "SUPABASE_SERVICE_ROLE_KEY present: $([ -n "$SUPABASE_SERVICE_ROLE_KEY" ] && echo yes)"; echo "SUPABASE_DB_URL=$SUPABASE_DB_URL"; echo "SUPABASE_DB_PASSWORD present: $([ -n "$SUPABASE_DB_PASSWORD" ] && echo yes)"
SUPABASE_URL=https://<ref>.supabase.co
SUPABASE_PROJECT_REF=<ref>
SUPABASE_ANON_KEY present: yes
SUPABASE_SERVICE_ROLE_KEY present: yes
SUPABASE_DB_URL=<redacted:SUPABASE_DB_URL>
SUPABASE_DB_PASSWORD present: yes
#2exit 0
which psql || echo "no psql"; echo "---"; which pg_isready || echo "no pg_isready"
/usr/bin/psql
---
/usr/bin/pg_isready
#3exit 0
export PGPASSWORD="$SUPABASE_DB_PASSWORD"
psql "$SUPABASE_DB_URL" -c "\d public.notes" 2>&1 | head -40
                            Table "public.notes"
 Column  |  Type  | Collation | Nullable |             Default              
---------+--------+-----------+----------+----------------------------------
 id      | bigint |           | not null | generated by default as identity
 user_id | uuid   |           | not null | 
 title   | text   |           | not null | 
 body    | text   |           | not null | ''::text
Indexes:
    "notes_pkey" PRIMARY KEY, btree (id)
Foreign-key constraints:
    "notes_user_id_fkey" FOREIGN KEY (user_id) REFERENCES auth.users(id) ON DELETE CASCADE
#4exit 0
export PGPASSWORD="$SUPABASE_DB_PASSWORD"
psql "$SUPABASE_DB_URL" -c "SELECT schemaname, tablename, rowsecurity FROM pg_tables WHERE tablename='notes';" 2>&1
echo "=== existing policies ==="
psql "$SUPABASE_DB_URL" -c "SELECT schemaname, tablename, policyname, cmd, qual, with_check FROM pg_policies WHERE tablename='notes';" 2>&1
 schemaname | tablename | rowsecurity 
------------+-----------+-------------
 public     | notes     | f
(1 row)

=== existing policies ===
 schemaname | tablename | policyname | cmd | qual | with_check 
------------+-----------+------------+-----+------+------------
(0 rows)
#5exit 0
export PGPASSWORD="$SUPABASE_DB_PASSWORD"
psql "$SUPABASE_DB_URL" -c "SELECT id, email FROM auth.users WHERE email IN ('alice@cari.dev','bob@cari.dev');" 2>&1
echo "=== notes count ==="
psql "$SUPABASE_DB_URL" -c "SELECT user_id, count(*) FROM public.notes GROUP BY user_id;" 2>&1
                  id                  |     email      
--------------------------------------+----------------
 9973bd9a-64f0-4830-b719-e89f7f150849 | alice@cari.dev
 bb2c7a4b-ae0a-498d-a181-a55e9a87cf86 | bob@cari.dev
(2 rows)

=== notes count ===
               user_id                | count 
--------------------------------------+-------
 bb2c7a4b-ae0a-498d-a181-a55e9a87cf86 |     2
 9973bd9a-64f0-4830-b719-e89f7f150849 |     2
(2 rows)
#6exit 0
echo "=== anon key, all notes (should currently leak all 4) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $SUPABASE_ANON_KEY" | head -c 2000
echo
echo "=== exit: $? ==="
=== anon key, all notes (should currently leak all 4) ===
[{"id":1,"user_id":"9973bd9a-64f0-4830-b719-e89f7f150849","title":"Groceries"}, 
 {"id":2,"user_id":"9973bd9a-64f0-4830-b719-e89f7f150849","title":"Call plumber"}, 
 {"id":3,"user_id":"bb2c7a4b-ae0a-498d-a181-a55e9a87cf86","title":"Gym plan"}, 
 {"id":4,"user_id":"bb2c7a4b-ae0a-498d-a181-a55e9a87cf86","title":"Trip ideas"}]
=== exit: 0 ===
#7exit 0
export PGPASSWORD="$SUPABASE_DB_PASSWORD"
psql "$SUPABASE_DB_URL" <<'SQL' 2>&1
BEGIN;

-- Enable Row Level Security on the table
ALTER TABLE public.notes ENABLE ROW LEVEL SECURITY;

-- Drop any pre-existing policies just in case (idempotent safety)
DROP POLICY IF EXISTS notes_select_own ON public.notes;
DROP POLICY IF EXISTS notes_insert_own ON public.notes;
DROP POLICY IF EXISTS notes_update_own ON public.notes;
DROP POLICY IF EXISTS notes_delete_own ON public.notes;

-- SELECT: authenticated users see only their own rows
CREATE POLICY notes_select_own ON public.notes
  FOR SELECT
  TO authenticated
  USING (auth.uid() = user_id);

-- INSERT: authenticated users can insert only rows with their own user_id
CREATE POLICY notes_insert_own ON public.notes
  FOR INSERT
  TO authenticated
  WITH CHECK (auth.uid() = user_id);

-- UPDATE: authenticated users can update only their own rows
CREATE POLICY notes_update_own ON public.notes
  FOR UPDATE
  TO authenticated
  USING (auth.uid() = user_id)
  WITH CHECK (auth.uid() = user_id);

-- DELETE: authenticated users can delete only their own rows
CREATE POLICY notes_delete_own ON public.notes
  FOR DELETE
  TO authenticated
  USING (auth.uid() = user_id);

COMMIT;

SELECT 'policies created' AS status;
SQL
BEGIN
ALTER TABLE
NOTICE:  policy "notes_select_own" for relation "public.notes" does not exist, skipping
DROP POLICY
NOTICE:  policy "notes_insert_own" for relation "public.notes" does not exist, skipping
DROP POLICY
NOTICE:  policy "notes_update_own" for relation "public.notes" does not exist, skipping
DROP POLICY
NOTICE:  policy "notes_delete_own" for relation "public.notes" does not exist, skipping
DROP POLICY
CREATE POLICY
CREATE POLICY
CREATE POLICY
CREATE POLICY
COMMIT
      status      
------------------
 policies created
(1 row)
#8exit 0
echo "=== anon key, all notes (should now be EMPTY / []) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $SUPABASE_ANON_KEY"
echo
=== anon key, all notes (should now be EMPTY / []) ===
[]
#9exit 0
get_token() {
  local email="$1" pass="$2"
  curl -s "$SUPABASE_URL/auth/v1/token?grant_type=password" \
    -H "apikey: $SUPABASE_ANON_KEY" \
    -H "Content-Type: application/json" \
    -d "{\"email\":\"$email\",\"password\":\"$pass\"}" | python3 -c "import sys,json; print(json.load(sys.stdin).get('access_token',''))"
}
export ALICE_TOKEN=$(get_token "alice@cari.dev" "Passw0rd-alice-42")
export BOB_TOKEN=$(get_token "bob@cari.dev" "Passw0rd-bob-58")
echo "Alice token length: ${#ALICE_TOKEN}"
echo "Bob token length: ${#BOB_TOKEN}"
Alice token length: 791
Bob token length: 788
#10exit 0
AUTH_HDR_ALICE="Authorization: Bearer $ALICE_TOKEN"
AUTH_HDR_BOB="Authorization: Bearer $BOB_TOKEN"
APIK="apikey: $SUPABASE_ANON_KEY"

echo "=== ALICE reads notes (should see only her 2) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" \
  -H "$APIK" -H "$AUTH_HDR_ALICE"
echo

echo "=== BOB reads notes (should see only his 2) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" \
  -H "$APIK" -H "$AUTH_HDR_BOB"
echo

echo "=== ALICE tries to read BOB's note id=3 directly (should be empty) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?id=eq.3&select=id,user_id,title" \
  -H "$APIK" -H "$AUTH_HDR_ALICE"
echo
=== ALICE reads notes (should see only her 2) ===
{"code":"PGRST301","details":null,"hint":null,"message":"Empty JWT is sent in Authorization header"}
=== BOB reads notes (should see only his 2) ===
{"code":"PGRST301","details":null,"hint":null,"message":"Empty JWT is sent in Authorization header"}
=== ALICE tries to read BOB's note id=3 directly (should be empty) ===
{"code":"PGRST301","details":null,"hint":null,"message":"Empty JWT is sent in Authorization header"}
#11exit 0
echo "=== ALICE token first/last chars ==="
echo "${ALICE_TOKEN:0:20} ... ${ALICE_TOKEN: -20}"

echo "=== ALICE reads notes ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" \
  -H "apikey: $SUPABASE_ANON_KEY" \
  -H "Authorization: Bearer $ALICE_TOKEN"
echo

echo "=== BOB reads notes ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" \
  -H "apikey: $SUPABASE_ANON_KEY" \
  -H "Authorization: Bearer $BOB_TOKEN"
echo

echo "=== ALICE tries BOB's note id=3 ==="
curl -s "$SUPABASE_URL/rest/v1/notes?id=eq.3&select=id,user_id,title" \
  -H "apikey: $SUPABASE_ANON_KEY" \
  -H "Authorization: Bearer $ALICE_TOKEN"
echo
=== ALICE token first/last chars ===
 ... 
=== ALICE reads notes ===
{"code":"PGRST301","details":null,"hint":null,"message":"Empty JWT is sent in Authorization header"}
=== BOB reads notes ===
{"code":"PGRST301","details":null,"hint":null,"message":"Empty JWT is sent in Authorization header"}
=== ALICE tries BOB's note id=3 ===
{"code":"PGRST301","details":null,"hint":null,"message":"Empty JWT is sent in Authorization header"}
#12exit 0
get_token() {
  curl -s "$SUPABASE_URL/auth/v1/token?grant_type=password" \
    -H "apikey: $SUPABASE_ANON_KEY" \
    -H "Content-Type: application/json" \
    -d "{\"email\":\"$1\",\"password\":\"$2\"}" | python3 -c "import sys,json; print(json.load(sys.stdin).get('access_token',''))"
}
ALICE_TOKEN=$(get_token "alice@cari.dev" "Passw0rd-alice-42")
BOB_TOKEN=$(get_token "bob@cari.dev" "Passw0rd-bob-58")
echo "Alice token len: ${#ALICE_TOKEN}, Bob token len: ${#BOB_TOKEN}"

echo "=== ALICE reads (expect her 2) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN"
echo
echo "=== BOB reads (expect his 2) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?select=id,user_id,title" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $BOB_TOKEN"
echo
echo "=== ALICE tries BOB's id=3 (expect []) ==="
curl -s "$SUPABASE_URL/rest/v1/notes?id=eq.3&select=id,user_id,title" -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN"
echo
Alice token len: 791, Bob token len: 788
=== ALICE reads (expect her 2) ===
[{"id":1,"user_id":"9973bd9a-64f0-4830-b719-e89f7f150849","title":"Groceries"}, 
 {"id":2,"user_id":"9973bd9a-64f0-4830-b719-e89f7f150849","title":"Call plumber"}]
=== BOB reads (expect his 2) ===
[{"id":3,"user_id":"bb2c7a4b-ae0a-498d-a181-a55e9a87cf86","title":"Gym plan"}, 
 {"id":4,"user_id":"bb2c7a4b-ae0a-498d-a181-a55e9a87cf86","title":"Trip ideas"}]
=== ALICE tries BOB's id=3 (expect []) ===
[]
#13exit 0
get_token() {
  curl -s "$SUPABASE_URL/auth/v1/token?grant_type=password" \
    -H "apikey: $SUPABASE_ANON_KEY" -H "Content-Type: application/json" \
    -d "{\"email\":\"$1\",\"password\":\"$2\"}" | python3 -c "import sys,json; print(json.load(sys.stdin).get('access_token',''))"
}
ALICE_TOKEN=$(get_token "alice@cari.dev" "Passw0rd-alice-42")
BOB_TOKEN=$(get_token "bob@cari.dev" "Passw0rd-bob-58")
ALICE_ID="9973bd9a-64f0-4830-b719-e89f7f150849"
BOB_ID="bb2c7a4b-ae0a-498d-a181-a55e9a87cf86"

echo "=== ALICE inserts a note WITH HER OWN user_id (expect success 201) ==="
curl -s -o /dev/null -w "HTTP %{http_code}\n" -X POST "$SUPABASE_URL/rest/v1/notes" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN" \
  -H "Content-Type: application/json" -H "Prefer: return=representation" \
  -d "{\"user_id\":\"$ALICE_ID\",\"title\":\"Test by alice\",\"body\":\"hello\"}"

echo "=== ALICE tries to insert with BOB's user_id (expect 403) ==="
curl -s -w "\nHTTP %{http_code}\n" -X POST "$SUPABASE_URL/rest/v1/notes" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN" \
  -H "Content-Type: application/json" \
  -d "{\"user_id\":\"$BOB_ID\",\"title\":\"Hijack as bob\",\"body\":\"evil\"}"
=== ALICE inserts a note WITH HER OWN user_id (expect success 201) ===
HTTP 201
=== ALICE tries to insert with BOB's user_id (expect 403) ===
{"code":"42501","details":null,"hint":null,"message":"new row violates row-level security policy for table \"notes\""}
HTTP 403
#14exit 0
get_token() {
  curl -s "$SUPABASE_URL/auth/v1/token?grant_type=password" \
    -H "apikey: $SUPABASE_ANON_KEY" -H "Content-Type: application/json" \
    -d "{\"email\":\"$1\",\"password\":\"$2\"}" | python3 -c "import sys,json; print(json.load(sys.stdin).get('access_token',''))"
}
ALICE_TOKEN=$(get_token "alice@cari.dev" "Passw0rd-alice-42")
BOB_TOKEN=$(get_token "bob@cari.dev" "Passw0rd-bob-58")
ALICE_ID="9973bd9a-64f0-4830-b719-e89f7f150849"
BOB_ID="bb2c7a4b-ae0a-498d-a181-a55e9a87cf86"

echo "=== ALICE updates her own note id=5 (expect 200) ==="
curl -s -o /dev/null -w "HTTP %{http_code}\n" -X PATCH "$SUPABASE_URL/rest/v1/notes?id=eq.5" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN" \
  -H "Content-Type: application/json" -d "{\"title\":\"Updated by alice\"}"

echo "=== ALICE tries to UPDATE BOB's note id=3 (expect 403 / no rows) ==="
curl -s -o /dev/null -w "HTTP %{http_code}\n" -X PATCH "$SUPABASE_URL/rest/v1/notes?id=eq.3" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN" \
  -H "Content-Type: application/json" -d "{\"title\":\"Hijack bob\"}"

echo "=== ALICE tries to DELETE BOB's note id=4 (expect 0 rows / 200 empty) ==="
curl -s -o /dev/null -w "HTTP %{http_code}\n" -X DELETE "$SUPABASE_URL/rest/v1/notes?id=eq.4" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN"

echo "=== ALICE DELETEs her own note id=5 (expect 204) ==="
curl -s -o /dev/null -w "HTTP %{http_code}\n" -X DELETE "$SUPABASE_URL/rest/v1/notes?id=eq.5" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN"
=== ALICE updates her own note id=5 (expect 200) ===
HTTP 204
=== ALICE tries to UPDATE BOB's note id=3 (expect 403 / no rows) ===
HTTP 204
=== ALICE tries to DELETE BOB's note id=4 (expect 0 rows / 200 empty) ===
HTTP 204
=== ALICE DELETEs her own note id=5 (expect 204) ===
HTTP 204
#15exit 0
export PGPASSWORD="$SUPABASE_DB_PASSWORD"
echo "=== Verify original data intact (per-user counts) ==="
psql "$SUPABASE_DB_URL" -c "SELECT user_id, count(*) FROM public.notes GROUP BY user_id ORDER BY user_id;"
echo "=== Confirm the test note id=5 is gone and bob/alice notes unchanged ==="
psql "$SUPABASE_DB_URL" -c "SELECT id, user_id, title FROM public.notes ORDER BY id;"
=== Verify original data intact (per-user counts) ===
               user_id                | count 
--------------------------------------+-------
 9973bd9a-64f0-4830-b719-e89f7f150849 |     2
 bb2c7a4b-ae0a-498d-a181-a55e9a87cf86 |     2
(2 rows)

=== Confirm the test note id=5 is gone and bob/alice notes unchanged ===
 id |               user_id                |    title     
----+--------------------------------------+--------------
  1 | 9973bd9a-64f0-4830-b719-e89f7f150849 | Groceries
  2 | 9973bd9a-64f0-4830-b719-e89f7f150849 | Call plumber
  3 | bb2c7a4b-ae0a-498d-a181-a55e9a87cf86 | Gym plan
  4 | bb2c7a4b-ae0a-498d-a181-a55e9a87cf86 | Trip ideas
(4 rows)
#16exit 0
get_token() {
  curl -s "$SUPABASE_URL/auth/v1/token?grant_type=password" \
    -H "apikey: $SUPABASE_ANON_KEY" -H "Content-Type: application/json" \
    -d "{\"email\":\"$1\",\"password\":\"$2\"}" | python3 -c "import sys,json; print(json.load(sys.stdin).get('access_token',''))"
}
ALICE_TOKEN=$(get_token "alice@cari.dev" "Passw0rd-alice-42")
BOB_ID="bb2c7a4b-ae0a-498d-a181-a55e9a87cf86"

echo "=== ALICE tries to reassign her note id=2 to BOB's user_id (expect 403) ==="
curl -s -w "\nHTTP %{http_code}\n" -X PATCH "$SUPABASE_URL/rest/v1/notes?id=eq.2" \
  -H "apikey: $SUPABASE_ANON_KEY" -H "Authorization: Bearer $ALICE_TOKEN" \
  -H "Content-Type: application/json" -d "{\"user_id\":\"$BOB_ID\"}"

echo "=== final policies ==="
export PGPASSWORD="$SUPABASE_DB_PASSWORD"
psql "$SUPABASE_DB_URL" -c "SELECT policyname, cmd, roles, qual, with_check FROM pg_policies WHERE tablename='notes' ORDER BY policyname;"
psql "$SUPABASE_DB_URL" -c "SELECT relname, relrowsecurity FROM pg_class WHERE relname='notes';"
=== ALICE tries to reassign her note id=2 to BOB's user_id (expect 403) ===
{"code":"42501","details":null,"hint":null,"message":"new row violates row-level security policy for table \"notes\""}
HTTP 403
=== final policies ===
    policyname    |  cmd   |      roles      |          qual          |       with_check       
------------------+--------+-----------------+------------------------+------------------------
 notes_delete_own | DELETE | {authenticated} | (auth.uid() = user_id) | 
 notes_insert_own | INSERT | {authenticated} |                        | (auth.uid() = user_id)
 notes_select_own | SELECT | {authenticated} | (auth.uid() = user_id) | 
 notes_update_own | UPDATE | {authenticated} | (auth.uid() = user_id) | (auth.uid() = user_id)
(4 rows)

 relname | relrowsecurity 
---------+----------------
 notes   | t
(1 row)

What it said at the end

All requirements are verified and the data is intact. Here's a summary of what I did: ## What I did **Diagnosis:** The `public.notes` table had **Row Level Security (RLS) disabled** (`relrowsecurity = f`), so every row was exposed to anyone with the anon key — confirmed by the anon REST call returning all 4 notes. **Fix applied via PostgreSQL (service role):** 1. `ALTER TABLE public.notes ENABLE ROW LEVEL SECURITY;` 2. Created four owner-scoped policies on `TO authenticated`: - `notes_select_own` — `USING (auth.uid() = user_id)` - `notes_insert_own` — `WITH CHECK (auth.uid() = user_id)` - `notes_update_own` — `USING (auth.uid() = user_id) WITH CHECK (auth.uid() = user_id)` - `notes_delete_own` — `USING (auth.uid() = user_id)` **Why this satisfies the requirements:** - Only `authenticated` role has policies; the `anon` role has **no** policy, so with RLS on, anon requests (where `auth.uid()` is NULL) match no policy and see **zero rows**. - `auth.uid()` is the caller's own JWT identity, so each user sees/modifies only their own rows. - The `WITH CHECK` on INSERT/UPDATE blocks writing a `user_id` that isn't the caller's, so a user **cannot** create or reassign a row to someone else's id. Legitimate owners' REST path is untouched. **Verified end-to-end through the REST API:** - ✅ Anon key → `[]` (no rows) - ✅ Alice reads only her 2 notes; Bob reads only his 2 - ✅ Alice → Bob's note `id=3` → `[]` - ✅ Alice inserts with her own id → `201`; inserts with Bob's id → `403` - ✅ Alice updates her own note → `204`; tries to change its `user_id` to Bob's → `403` - ✅ Alice updates/deletes Bob's notes → `0` affected rows (RLS filters them out, no data changed); Alice deletes her own test note → `204` - ✅ Original 4 notes (alice: Groceries, Call plumber; bob: Gym plan, Trip ideas) are **completely unchanged** — no data was modified.

13 earlier narration turn(s) are in the raw transcript.

How it was graded

A shell script executed against the live project and asserted on the state the agent left behind. No model judged another model.

exit 0 OK

Check it yourself

Raw transcript · Task definition and verifier · Every attempt