dgraph-io dgraph up to 25.3.1 /debug/pprof/cmdline cache_mb information disclosure

Summaryinfo

A vulnerability has been found in dgraph-io dgraph up to 25.3.1 and classified as problematic. Affected is the function cache_mb of the file /debug/pprof/cmdline. This manipulation causes information disclosure. The identification of this vulnerability is CVE-2026-40173. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in dgraph-io dgraph up to 25.3.1. It has been declared as problematic. Affected by this vulnerability is the function cache_mb of the file /debug/pprof/cmdline. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Dgraph is an open source distributed GraphQL database. Versions 25.3.1 and prior contain an unauthenticated credential disclosure vulnerability where the /debug/pprof/cmdline endpoint is registered on the default mux and reachable without authentication, exposing the full process command line including the admin token configured via the --security "token=..." startup flag. An attacker can retrieve the leaked token and reuse it in the X-Dgraph-AuthToken header to gain unauthorized access to admin-only endpoints such as /admin/config/cache_mb, bypassing the adminAuthHandler token validation. This enables unauthorized privileged administrative access including configuration changes and operational control actions in any deployment where the Alpha HTTP port is reachable by untrusted parties. This issue has been fixed in version 25.3.2.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-40173 since 04/09/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 25.3.2 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• dgraph-io

Name

• dgraph

Version

• 25.3.0
• 25.3.1

Website

• Product: https://github.com/dgraph-io/dgraph/

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CPE 2.2info

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