CVE-2026-44840: Dgraph Vulnerable to DQL Injection via checkUserPassword GraphQL Query

June 29, 2026

The checkUserPassword GraphQL query in Dgraph is vulnerable to DQL (Dgraph Query Language) injection. User-supplied password values are interpolated directly into a DQL checkpwd() query via fmt.Sprintf without any escaping or parameterization. An attacker can inject a password containing a double-quote character to break out of the DQL string literal and append arbitrary DQL query blocks.

References

github.com/advisories/GHSA-q2m9-6jp9-c6mc
github.com/dgraph-io/dgraph/commit/cee702c93f141eeb0c96a81f70830ec9e459efac
github.com/dgraph-io/dgraph/releases/tag/v25.3.4
github.com/dgraph-io/dgraph/security/advisories/GHSA-q2m9-6jp9-c6mc
nvd.nist.gov/vuln/detail/CVE-2026-44840

Code Behaviors & Features

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