---
id: CVE-2026-92103
title: >-
  Allocation of Resources Without Limits or Throttling vulnerability in
  elixir-mint mint allows a malicious HTTP/2 server to make the client hold up
  to about 16 MiB per connection in frames it should reject, consuming client
  memory.


  Mint.…
summary: >-
  Allocation of Resources Without Limits or Throttling vulnerability in
  elixir-mint mint allows a malicious HTTP/2 server to make the client hold up
  to about 16 MiB per connection in frames it should reject, consuming client
  memory.


  Mint.…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'
cwe:
  - CWE-770
vendor: elixir-mint
product: mint
affected:
  - mint >= 0.1.0 < 1.11.0
  - >-
    elixir-mint/mint >= 596ca4304504be68939c4929e0831557097962b8 <
    20252ca85065f4d1092aed9ee4ed21841a507dfe
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T12:17:41.973'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92103'
references:
  - url: 'https://cna.erlef.org/cves/CVE-2026-92103.html'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/elixir-mint/mint/commit/20252ca85065f4d1092aed9ee4ed21841a507dfe
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/elixir-mint/mint/commit/596ca4304504be68939c4929e0831557097962b8
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: >-
      https://github.com/elixir-mint/mint/security/advisories/GHSA-q95c-ccq6-j5j6
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
  - url: 'https://osv.dev/vulnerability/EEF-CVE-2026-92103'
    label: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-28T13:09:42.227Z'
---

## Overview

Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint mint allows a malicious HTTP/2 server to make the client hold up to about 16 MiB per connection in frames it should reject, consuming client memory.

Mint.HTTP2.Frame.decode_next/2 in lib/mint/http2/frame.ex compares a frame with the client's max_frame_size (16,384 bytes by default) only once the whole declared payload has arrived. Until then it returns :more, and Mint.HTTP2 keeps every received byte in the connection buffer. A server can declare a frame length of up to 16,777,215 bytes and withhold the last byte, keeping roughly 1,024 times the advertised limit buffered for as long as the connection stays open. The server has to send every byte the client buffers, so there is no amplification, and the buffer stops at the 24-bit frame length limit.

This issue affects mint: from 0.1.0 before 1.11.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.