Atomicorp WAF Research Note: CVE-2026-34976

Dgraph <=v25.3.0 - Admin Mutation Missing Authorization

CVE Details

• Already protected by existing Atomicorp WAF rules
• Protection status: Understanding Atomicorp WAF Protection Status
• CVE: CVE-2026-34976
• Name: Dgraph <=v25.3.0 - Admin Mutation Missing Authorization
• Severity: Critical
• CVSS: 10.0 (v3.1) (Critical)
• CVSS version: 3.1
• CVSS source: GitHub_M CNA
• CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • Attack vector: Network
  • Attack complexity: Low
  • Privileges required: None
  • User interaction: None
  • Scope: Changed
  • Confidentiality impact: High
  • Integrity impact: High
  • Availability impact: High
• CWE: CWE-862 — Missing Authorization
• Related CAPEC attack patterns (via MITRE CWE relationships): CAPEC-665 (opens in a new tab)
• Vendor: hypermodeinc
• Vulnerable products: dgraph , dgraph
• CVE published: 2026-04-06
• CVE last modified: 2026-06-17
• Affected versions (NVD configurations):
  • dgraph: <= 25.3.0
• EPSS: 0.0204; 80.0th percentile (FIRST (opens in a new tab) )
• Latest Update: 2026-08-28
• Selected Rule IDs observed: 398008
• Matching rules: 1; rules with blocking actions: 0
• Would-block Rule IDs: N/A
• Request surfaces inspected: JSON request data, Request arguments, SOAP request data, XML request data

Vulnerability Description

Dgraph is an open source distributed GraphQL database. Prior to 25.3.1, the restoreTenant admin mutation is missing from the authorization middleware config (admin.go), making it completely unauthenticated. Unlike the similar restore mutation which requires Guardian-of-Galaxy authentication, restoreTenant executes with zero middleware. This mutation accepts attacker-controlled backup source URLs (including file:// for local filesystem access), S3/MinIO credentials, encryption key file paths, and Vault credential file paths. An unauthenticated attacker can overwrite the entire database, read server-side files, and perform SSRF. This vulnerability is fixed in 25.3.1.

Recommended Actions

1. Maintain the observed Atomicorp detections. Keep your Atomicorp commercial rules current and confirm that the selected observed rules (398008 ) have not been locally disabled. Atomicorp commercial rules are enabled by default. If you use Atomic WAF, review the applicable policy and rule settings. These observations are detection-only; review the resulting events and do not assume they block exploitation.

2. Apply the vendor’s remediation. WAF protection is defense in depth and does not replace upgrading or following the affected vendor’s guidance.

   • Affected versions: dgraph-io dgraph version < 25.3.1.
   • No specific CNA/vendor solution or workaround is included in the current CVE Record (opens in a new tab) . Review the vendor’s security advisories and supported-release guidance before making changes.

3. Validate after changes. Confirm rule updates are current, review WAF events for the affected application, and test application behavior after vendor upgrades, mitigations, or local policy changes.

Research Notes

Atomicorp WAF protections are designed around attack techniques and exploit behaviors, allowing existing protections to apply across multiple vulnerabilities without requiring a unique rule for every CVE.

Public Vulnerability References

• NVD (opens in a new tab)
• CVE Record (opens in a new tab)
• Vendor advisory: https://github.com/dgraph-io/dgraph/security/advisories/GHSA-p5rh-vmhp-gvcw (opens in a new tab)

Test or Research Source

• Source: http/cves/2026/CVE-2026-34976.yaml (opens in a new tab)
• Tags: auth-bypass, cve, cve2026, dgraph, ssrf

Research Note Context

This research note documents exploit-technique analysis associated with this vulnerability and references Atomicorp WAF protections observed during engineering review, testing, or validation activities.

Atomicorp security controls are generally designed to identify and mitigate attack techniques and exploit behaviors rather than individual CVE identifiers. As a result, protections developed for one vulnerability may also apply to related attack variants and future vulnerabilities using similar techniques.

Learn More

Atomicorp develops commercially supported security technologies for web applications, servers, endpoints, workloads, and legacy enterprise platforms.

Organizations interested in protecting systems against exploit techniques associated with vulnerabilities such as this one can learn more about:

• Atomic ModSecurity Rules: commercially maintained WAF rules for ModSecurity deployments, including protections for web attacks, bots, scanners, malware, exploitation attempts, and emerging vulnerability classes.
• Atomic WAF: an enterprise web application firewall with Atomicorp rules, centralized management, reporting, authentication controls, and operational tooling.
• Atomic ModSecurity Integrator: a special licensing option for MSPs, MSSPs, OEMs, VARs, reverse proxy providers, and other integrators who want to incorporate Atomicorp ModSecurity rule technology into their own products or services.
• Atomic OSSEC: an enterprise OSSEC-based intrusion detection, compliance, and security monitoring platform.
• Atomic Protector: workload protection for Linux, web, cloud, data center, and hybrid environments.

For additional information, product evaluations, or technical discussions, visit https://www.atomicorp.com/ or https://modsecurity.io/ (opens in a new tab) .