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CVE-2026-33149 is a host header poisoning vulnerability in Tandoor Recipes affecting versions up to and including 2.5.3. The application is configured with a permissive default host validation setting that accepts arbitrary HTTP Host header values. Because the application uses Django's absolute-URL generation functionality to construct server-generated links in multiple contexts, including invitation emails, API pagination, and OpenAPI schema generation, an attacker can supply a crafted Host header and cause the application to embed attacker-controlled origins in generated URLs. The most severe documented case is invite link poisoning: when an administrator creates an invite, the resulting email can contain a link pointing to attacker-controlled infrastructure rather than the legitimate application, allowing interception of the invite token when the recipient follows the link.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a small standalone Python proof-of-concept for CVE-2026-33149 affecting Tandoor Recipes <= 2.5.3. It contains three files: an MIT license, a detailed README describing the vulnerability and attack scenarios, and a single executable script, poc.py, which is the main exploit entry point. The exploit targets a Host header injection condition caused by permissive Django host validation (ALLOWED_HOSTS='*'). Its core capability is to send authenticated requests with an attacker-controlled Host header and observe whether Tandoor Recipes uses that untrusted host when generating absolute URLs. The script is modular and supports multiple checks: confirming arbitrary Host acceptance, testing whether API pagination links reflect the injected host, testing whether schema/OpenAPI output reflects the injected host, and triggering invite poisoning so that invite emails contain attacker-controlled links. Operationally, the script uses the requests library, disables TLS verification, and supports two authentication modes: session cookie + CSRF token, or HTTP Basic Auth. The attacker supplies a target base URL and an attacker-controlled domain via command-line arguments. Optional arguments include victim email and group ID for the invite-poisoning workflow. The script prints colored status output and a final vulnerability summary. This is not merely a detector: it actively exercises vulnerable functionality and can trigger a real security impact by causing poisoned invite links to be generated. However, it does not deliver a post-exploitation shell or arbitrary code execution payload; instead, its payload is the malicious Host header value used to redirect server-generated URLs. Overall, the repository is a focused, operational web exploit PoC demonstrating URL poisoning and phishing/token-capture implications in Tandoor Recipes.
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