CVE-2026-94194 Other in mint
A malicious server can desynchronize the Mint HTTP client and intermediaries via response smuggling, poisoning subsequent responses on pooled connections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-94194?
CVE-2026-94194 is a medium-severity vulnerability in elixir-mint mint, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in elixir-mint mint allows a malicious HTTP/1 server to desynchronize an intermediary and the Mint client on a pooled connection, poisoning the responses to subsequent requests that share the connection.
message_body/1 in lib/mint/http1.ex selects chunked framing when chunked is the first coding listed in a response's Transfer-Encoding fields. RFC 9112 section 6.3 applies chunked framing only when chunked is the final coding, and otherwise reads the body until the server closes the connection. For a response such as Transfer-Encoding: chunked, gzip, an intermediary that follows the RFC treats every byte up to the close as the body, while Mint ends the body at the zero-length chunk and parses the remaining bytes as the response to the next request on the connection.
Mint also keeps the connection open after an HTTP/1.0 response, final or 1xx, that carries Transfer-Encoding and Connection: keep-alive. RFC 9112 section 6.1 requires treating the framing of such a message as faulty and closing the connection after it, so bytes after its chunked body are parsed as the response to the next request in the same way.
This issue affects mint: from 0.1.0 before 1.10.2.
Weakness: CWE-444
Which versions are affected by CVE-2026-94194?
1 open source package ship an affected version, including mint.
| Package | Affected | Fixed in |
|---|---|---|
mint Hex | From 0.1.0 | 1.10.2 |
How do I fix CVE-2026-94194?
Upgrade mint to 1.10.2 or later.
Is CVE-2026-94194 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94194 exists.
Sources
Also known as EEF-CVE-2026-94194, GHSA-gvrc-75rc-7gj9.