Cross account lakeformation tables in AWS

Start in pyiceberg/catalog/rest/init.py at load_table(), then inspect pyiceberg/catalog/rest/response.py and its _handle_non_200_response path. Reproduce the cross-account Lake Formation request using the configuration and permissions described in the issue. Done means load_table() can access the cross-account table successfully, or the 403 response is reported with the correct cause.

Apache Iceberg version

0.11.1

Please describe the bug 🐞

We have our datalake that is apache iceberg format that is governed by lakeformation (account A). We have various other AWS accounts that are trying to read in a lambda using pyiceberg.

All boto3 calls to fetch the data work correctly, to me verifying that the IAM permissions and Lake formation permissions are correct. Additionally boto3 athena calls are successful. However when pyiceberg, it fails with the following error:

[ERROR] ForbiddenError: RESTError 403: Received unexpected JSON Payload: { "error": { "code": 403, "type": "AccessDeniedException" } } , errors: Field required Traceback (most recent call last): File "/var/task/lambda_function.py", line 38, in lambda_handler results = fetch_dataset() File "/var/task/lambda_function.py", line 64, in fetch_dataset table = catalog.load_table("curated_sales_and_policy.ods_agent") File "/opt/python/lib/python3.13/site-packages/tenacity/__init__.py", line 331, in wrapped_f return copy(f, *args, **kw) File "/opt/python/lib/python3.13/site-packages/tenacity/__init__.py", line 470, in __call__ do = self.iter(retry_state=retry_state) File "/opt/python/lib/python3.13/site-packages/tenacity/__init__.py", line 371, in iter result = action(retry_state) File "/opt/python/lib/python3.13/site-packages/tenacity/__init__.py", line 393, in <lambda> self._add_action_func(lambda rs: rs.outcome.result()) File "/var/lang/lib/python3.13/concurrent/futures/_base.py", line 449, in result return self.__get_result() File "/var/lang/lib/python3.13/concurrent/futures/_base.py", line 401, in __get_result raise self._exception File "/opt/python/lib/python3.13/site-packages/tenacity/__init__.py", line 473, in __call__ result = fn(*args, **kwargs) File "/opt/python/lib/python3.13/site-packages/pyiceberg/catalog/rest/__init__.py", line 921, in load_table _handle_non_200_response(exc, {404: NoSuchTableError}) File "/opt/python/lib/python3.13/site-packages/pyiceberg/catalog/rest/response.py", line 111, in _handle_non_200_response raise exception(response) from exc

here is the relevant piece of code:
` catalog = load_catalog(
"glue_rest",
**{
"type": "rest",
"uri": "https://glue.us-east-2.amazonaws.com/iceberg",
"warehouse": "account_A_account_number",
"rest.sigv4-enabled": "true",
"rest.signing-region": "us-east-2",
"rest.signing-name": "glue",
}
)

table = catalog.load_table("database1.table1")`

here is our settings:
AccountA:

• lakeformation describe on Database
• lakeformation describe, select on relevant tables
• have a proper data location access resource create in lakeformation granting the execution role the appropriate access

AccountB:

• lambda execution role has glue:* and lakeformation:GetDataAccess

Just to note, the catalog is created successfully and doesn't throw an error, but it does when we specifically on load_table()

I've tried troubleshooting by playing with the headers being sent and messing with the header value sig4-enabled. Nothing seems to work.

Does anyone have a working example and the configuration you are using? Is this support with the current version (we are on latest 0.11.1).

Any help would be appreciated. I can provide additional information if needed.

Willingness to contribute

• I can contribute a fix for this bug independently
• I would be willing to contribute a fix for this bug with guidance from the Iceberg community
• I cannot contribute a fix for this bug at this time