CVE-2026-41492 PoC — Unauthenticated Admin Token Disclosure Leading to Authentication Bypass via /debug/vars in Dgraph

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-41492.yaml

Associated Vulnerability

Title: Unauthenticated Admin Token Disclosure Leading to Authentication Bypass via /debug/vars in Dgraph (CVE-2026-41492)
Description:Dgraph is an open source distributed GraphQL database. Prior to 25.3.3, Dgraphl exposes the process command line through the unauthenticated /debug/vars endpoint on Alpha. Because the admin token is commonly supplied via the --security "token=..." startup flag, an unauthenticated attacker can retrieve that token and replay it in the X-Dgraph-AuthToken header to access admin-only endpoints. This is a variant of the previously fixed /debug/pprof/cmdline issue, but the current fix is incomplete because it blocks only /debug/pprof/cmdline and still serves http.DefaultServeMux, which includes expvar's /debug/vars handler. This vulnerability is fixed in 25.3.3.

Description

Dgraph <= 25.3.2 contains an information disclosure caused by unauthenticated access to the /debug/vars endpoint , which publishes  the cmdline variable including the --security token= flag, letting unauthenticated remote attackers retrieve the admin token and access admin-only endpoints, exploit requires no authentication.

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