CVE-2026-82672

mint · Vulnerability

CVSS 4.0 6.3 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-82672

Published

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in elixir-mint mint allows a malicious HTTP/1 server to desynchronize a strict intermediary and the Mint client on a pooled connection, enabling response-queue poisoning against subsequent requests that share the connection. Mint.HTTP1.Parse.chunk_size/1 in lib/mint/http1/parse.ex stops at the first non-hexadecimal byte of a chunked response's chunk-size line and returns the remainder unexamined. Mint.HTTP1.decode_body/5 in lib/mint/http1.ex then discards every byte up to the CRLF with Parse.ignore_until_crlf/1, so the accepted grammar is a run of hex digits followed by arbitrary bytes, where RFC 9112 permits only a ;-introduced chunk extension. Lines such as 5ZZZZZ and 5 9 are accepted as chunk size 5, and 0ZZZZ is accepted as the terminating chunk that ends the message body. An RFC-strict intermediary rejects such a line while Mint accepts it, so the two disagree on chunk boundaries and on where the response ends. This issue affects mint: from 0.1.0 before 1.10.1.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-82672

Published

mint

https://repo.hex.pm

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Mint.HTTP1.Parse'",
                        "'Elixir.Mint.HTTP1'"
                    ],
                    "packageName": "mint",
                    "packageURL": "pkg:hex/mint",
                    "product": "mint",
                    "programFiles": [
                        "lib/mint/http1/parse.ex",
                        "lib/mint/http1.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Mint.HTTP1.Parse':chunk_size/1"
                        },
                        {
                            "name": "'Elixir.Mint.HTTP1.Parse':ignore_until_crlf/1"
                        },
                        {
                            "name": "'Elixir.Mint.HTTP1':decode_body/5"
                        }
                    ],
                    "repo": "https://github.com/elixir-mint/mint",
                    "vendor": "elixir-mint",
                    "versions": [
                        {
                            "lessThan": "1.10.1",
                            "status": "affected",
                            "version": "0.1.0",
                            "versionType": "semver"
                        }
                    ]
                }

elixir-mint/mint

https://github.com

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Mint.HTTP1.Parse'",
                        "'Elixir.Mint.HTTP1'"
                    ],
                    "packageName": "elixir-mint/mint",
                    "packageURL": "pkg:github/elixir-mint/mint",
                    "product": "mint",
                    "programFiles": [
                        "lib/mint/http1/parse.ex",
                        "lib/mint/http1.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Mint.HTTP1.Parse':chunk_size/1"
                        },
                        {
                            "name": "'Elixir.Mint.HTTP1.Parse':ignore_until_crlf/1"
                        },
                        {
                            "name": "'Elixir.Mint.HTTP1':decode_body/5"
                        }
                    ],
                    "repo": "https://github.com/elixir-mint/mint",
                    "vendor": "elixir-mint",
                    "versions": [
                        {
                            "lessThan": "c82377838dc6e275ef40bafa664fbcdf50270c60",
                            "status": "affected",
                            "version": "60089586ec7adc9fddb09f69a2f5919ba9ac7f33",
                            "versionType": "git"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON