# CVE-2026-82672 — elixir-mint mint

> As of 2026-09-19, CVE-2026-82672 is a Medium-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in elixir-mint mint, CVSS v4.0 6.3, EPSS 0.3% (23.0th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-82672 as of 2026-09-19; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-19

## What is CVE-2026-82672?

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.

The record classifies CVE-2026-82672 under weakness class [CWE-444](https://intel.threadlinqs.com/cwe/CWE-444). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 16 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 6.3 — Medium (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 23.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-19

## Is CVE-2026-82672 being exploited?

Weaponised exploit code for CVE-2026-82672 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 44 in the Threadlinqs vulnerability feed.

- [trickest/cve](https://github.com/trickest/cve/blob/main/2026/CVE-2026-82672.md) (trickest)

## Affected products and versions

- **elixir-mint**: mint

## How to fix CVE-2026-82672

No vendor patch reference has been recorded for CVE-2026-82672 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-82672

No threat campaign in the Threadlinqs corpus currently references CVE-2026-82672, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-09-20. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — related](https://github.com/elixir-mint/mint/security/advisories/GHSA-rj5m-69wp-cxq9)
- [github.com — patch](https://github.com/elixir-mint/mint/commit/c82377838dc6e275ef40bafa664fbcdf50270c60)

**Other references**

- [cna.erlef.org — related](https://cna.erlef.org/cves/CVE-2026-82672.html)
- [osv.dev — related](https://osv.dev/vulnerability/EEF-CVE-2026-82672)
- [github.com — related](https://github.com/elixir-mint/mint/commit/60089586ec7adc9fddb09f69a2f5919ba9ac7f33)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-82672
Full detection coverage and IOCs for threats exploiting CVE-2026-82672 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp