What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-24 · updated 2026-10-25
• Weakness: CWE-200

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.

Affected products

• dgraph-io dgraph: before 25.3.3 — fixed in 25.3.3

How to fix

Upgrade to a fixed version: dgraph-io dgraph 25.3.3. Check the vendor advisory for mitigations.

References

• https://github.com/dgraph-io/dgraph/releases/tag/v25.3.3
• https://github.com/dgraph-io/dgraph/security/advisories/GHSA-vvf7-6rmr-m29q
• https://github.com/dgraph-io/dgraph/security/advisories/GHSA-vvf7-6rmr-m29q

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