SSRF to RCE: Full Chain Analysis in Modern Web Frameworks

By Tech Ordus Research April 10, 2026 web-exploits

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Overview

Server-side request forgery remains one of the highest-impact classes in cloud-hosted applications. This analysis covers the full escalation path from initial SSRF discovery through privilege escalation to code execution.

Attack Surface

Modern web frameworks that process user-supplied URLs are the primary target. Key sinks include:

Webhook delivery endpoints
PDF generation services (wkhtmltopdf, headless Chrome)
Image proxy and thumbnail services
XML/JSON external entity processing

Metadata Service Abuse

On cloud infrastructure, the primary target is always the instance metadata service:

http://169.254.169.254/latest/meta-data/iam/security-credentials/
http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/
http://169.254.169.254/metadata/instance?api-version=2021-02-01

Redis Escalation

If the SSRF reaches an internal Redis instance on port 6379, code execution is achievable via config set and cron injection:

gopher://127.0.0.1:6379/_%2A1%0D%0A%248%0D%0Aflushall%0D%0A

Mitigations

Allowlist outbound destinations at the network layer
Block RFC 1918 ranges and link-local addresses in URL validators
Require 169.254.169.254 blocking at the load balancer
Use IMDSv2 token-required mode on AWS