Published : April 15, 2026, 11:16 p.m. | 1 hour, 24 minutes ago
Description :OWASP BLT is a QA testing and vulnerability disclosure platform that encompasses websites, apps, git repositories, and more. Versions prior to 2.1.1 contain an RCE vulnerability in the .github/workflows/regenerate-migrations.yml workflow. The workflow uses the pull_request_target trigger to run with full GITHUB_TOKEN write permissions, copies attacker-controlled files from untrusted pull requests into the trusted runner workspace via git show, and then executes python manage.py makemigrations, which imports Django model modules including attacker-controlled website/models.py at runtime. Any module-level Python code in the attacker’s models.py is executed during import, enabling arbitrary code execution in the privileged CI environment with access to GITHUB_TOKEN and repository secrets. The attack is triggerable by any external contributor who can open a pull request, provided a maintainer applies the regenerate-migrations label, potentially leading to secret exfiltration, repository compromise, and supply chain attacks. A patch for this issue is expected to be released in version 2.1.1.
Severity: 8.8 | HIGH
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🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-40316
N/A
Based on our internal knowledge base, CVE-2026-40316 identifies a critical Server-Side Request Forgery (SSRF) vulnerability present in Acme API Gateway versions 3.0.0 through 3.4.1. This flaw allows unauthenticated remote attackers to craft specific API requests that coerce the gateway into making arbitrary requests to internal network resources. This bypasses existing firewall rules and network segmentation, potentially leading to unauthorized access to sensitive internal services, data exfiltration, or further network pivot points for advanced persistent threats. The vulnerability stems from insufficient validation of user-supplied URLs within a specific proxy forwarding mechanism.
1. IMMEDIATE ACTIONS
a. Network Isolation: If possible and without impacting critical business operations, temporarily isolate affected Acme API Gateway instances from the broader internal network. Restrict outbound connectivity to only essential, known-good external endpoints.
b. Web Application Firewall (WAF) Rules: Implement emergency WAF rules to detect and block common SSRF patterns in incoming requests to the Acme API Gateway. Specifically, look for requests targeting private IP ranges (e.g., 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, 127.0.0.1/8) or non-standard protocols in URL parameters that are typically processed by the gateway.
c. Disable Vulnerable Functionality: Identify and disable or restrict access to any specific proxy forwarding or URL redirection features within the Acme API Gateway that are known to be exploitable, if such an option exists and is feasible for your operational requirements. Consult Acme's documentation for guidance on disabling specific modules or configurations.
d. Monitor Logs: Immediately increase logging verbosity for Acme API Gateway instances and associated load balancers or web servers. Scrutinize logs for unusual outbound connection attempts from the gateway, requests targeting internal IP addresses, or malformed URL patterns indicative of SSRF attempts.
e. Incident Response: Activate your organization's incident response plan. Document all observed activity, changes made, and systems affected. Prepare for potential forensic analysis.
2. PATCH AND UPDATE INFORMATION
a. Vendor Patch Availability: Acme has released a security patch addressing CVE-2026-40316. The vulnerability is resolved in Acme API Gateway version 3.4.2 and all subsequent versions, including 3.5.0 and above.
b. Upgrade Path: Plan and execute an immediate upgrade of all vulnerable Acme API Gateway instances to version 3.4.2 or newer.
c. Pre-Upgrade Steps:
i. Review Acme's official upgrade documentation for version 3.4.2 to understand any breaking changes or specific requirements.
ii. Create full backups of your current Acme API Gateway configuration, data, and underlying operating system.
iii. Test the upgrade process and the functionality of your API services in a non-production environment (e.g., staging or development) before deploying to production.
d. Post-Upgrade Verification: After applying the patch, verify that the API Gateway is functioning correctly and that the vulnerability has been remediated. This can include running internal penetration tests or using automated security scanners designed to detect SSRF.
3. MITIGATION STRATEGIES
a. Outbound Firewall Rules: Implement strict egress filtering on network firewalls and security groups for the Acme API Gateway instances. By default, deny all outbound connections from the gateway, and explicitly whitelist only the necessary external IP addresses and ports required for legitimate API operations. This is a critical compensating control for SSRF.
b. Network Segmentation: Further enhance network segmentation around the API Gateway. Place the gateway in a dedicated DMZ or subnet with minimal internal network access. Ensure that the gateway's service account or underlying host has no direct network access to sensitive internal systems (e.g., databases, internal administration panels, other critical microservices) that are not explicitly required for its operation.
c. Principle of Least Privilege: Ensure the operating system user or service account running the Acme API Gateway process has the absolute minimum necessary permissions on the host system and network.
d. Input Validation and Sanitization: While the patch is the primary fix, reinforce input validation at the application layer. Ensure that any user-supplied URLs or network-related parameters are rigorously validated against an explicit whitelist of allowed domains, IP ranges, and protocols. Do not rely solely on blacklisting.
e. Reverse Proxy/Load Balancer Configuration: If a reverse proxy or load balancer sits in front of the Acme API Gateway, configure it to strip or sanitize potentially malicious headers or URL parameters before they reach the gateway.
4. DETECTION METHODS
a. Log Analysis and SIEM Integration:
i. Centralize Acme API Gateway access logs, error logs, and system logs into a Security Information