CVE-2026-94194Public exploitNetwork attack vectorHinoki check available

Response poisoning via incorrect transfer-coding framing

Published Sep 28, 2026 · Updated Sep 28, 2026

HTTP response smuggling in Mint before 1.11.0 allows remote attackers controlling an HTTP/1 server to poison responses on pooled connections. In lib/mint/http1.ex, message_body/1 selects chunked framing from the first Transfer-Encoding coding rather than the final coding; Mint also retains faulty HTTP/1.0 keep-alive responses. An RFC-compliant intermediary and a reused connection are required for appended bytes to become a later request's response while genuine responses shift onward.

CVSS severity6.3
Medium
EPSS probability0.33%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

HTTP response smuggling in Mint before 1.11.0 allows remote attackers controlling an HTTP/1 server to poison responses on pooled connections. In lib/mint/http1.ex, message_body/1 selects chunked framing from the first Transfer-Encoding coding rather than the final coding; Mint also retains faulty HTTP/1.0 keep-alive responses. An RFC-compliant intermediary and a reused connection are required for appended bytes to become a later request's response while genuine responses shift onward.

The record

CVE
CVE-2026-94194
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
Elixir Mint
Product
Mint
Classifications
CWE-444
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.1.0 <1.11.0
  2. Affected versionversion=60089586ec7adc9fddb09f69a2f5919ba9ac7f33 <2ec8b696b5475ecbdaa87c0098957bca339e17c0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Elixir Mint · Mintversion=0.1.0 <1.11.0; version=60089586ec7adc9fddb09f69a2f5919ba9ac7f33 <2ec8b696b5475ecbdaa87c0098957bca339e17c0

Published CVSS scores

6.3Elixir MintCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Public exploit references

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Technologies

Your stack

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