CVE-2026-40091 SpiceDB: SPICEDB_DATASTORE_CONN_URI is leaked on startup logs

What is CVE-2026-40091?

CVE-2026-40091 is a medium-severity vulnerability in authzed spicedb, published on 14 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

SpiceDB is an open source database system for creating and managing security-critical application permissions. In versions 1.49.0 through 1.51.0, when SpiceDB starts with log level info, the startup "configuration" log will include the full datastore DSN, including the plaintext password, inside DatastoreConfig.URI. This issue has been fixed in version 1.51.1. If users are unable to immediately upgrade, they can work around this issue by changing the log level to warn or error.

Weakness: CWE-532

Which versions are affected by CVE-2026-40091?

3 open source packages ship an affected version, including github.com/authzed/spicedb. It affects 1 product.

Products include Authzed Spicedb.

How do I fix CVE-2026-40091?

Upgrade github.com/authzed/spicedb to 1.51.1 or later.

Is CVE-2026-40091 being exploited?

There is no known exploitation of CVE-2026-40091 in the wild and no public exploit code.

Other vulnerabilities in authzed spicedb

• CVE-2023-29193 SpiceDB binding metrics port to untrusted networks and can leak command-line flags High 8.7
• CVE-2022-21646 Lookup operations do not take into account wildcards in SpiceDB High 8.1
• CVE-2024-27101 Integer overflow in chunking helper causes dispatching to miss elements or panic High 7.3
• CVE-2023-46255 `SPICEDB_DATASTORE_CONN_URI` is leaked when URI cannot be parsed Medium 4.2
• CVE-2025-49011 SpiceDB checks involving relations with caveats can result in no permission when permission is expected Low 3.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jf4f-rr2c-9m58, GO-2026-5465.