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CVE-2026-67181 is an HTTP request smuggling vulnerability in Rouille versions 0.3.3 through 3.6.2. The flaw is in the proxy implementation in src/proxy.rs, which forwards a client-supplied Transfer-Encoding header to upstream backends unchanged while the request body has already been de-chunked by tiny_http. This creates a parsing inconsistency between the front-end proxy behavior and the backend server’s interpretation of the request, enabling CL.TE desynchronization. By crafting requests that exploit this mismatch, a remote attacker can cause the backend to misidentify where the request body ends and where the next request begins.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Unknown
An HTTP request smuggling vulnerability in rouille caused by Transfer-Encoding desynchronization.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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