---
id: CVE-2026-70616
title: >-
  boringproxy through 0.10.0 contains a resource exhaustion vulnerability that
  allows any authenticated user to permanently exhaust server file descriptors,
  goroutines, and memory by sending requests to the GET /loading endpoint with
  attac…
summary: >-
  boringproxy through 0.10.0 contains a resource exhaustion vulnerability that
  allows any authenticated user to permanently exhaust server file descriptors,
  goroutines, and memory by sending requests to the GET /loading endpoint with
  attac…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-833
published: '2026-08-05'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70616'
references:
  - url: >-
      https://github.com/theopaid/Denial-Of-Service-Through-Unbounded-Resource-Consumption-In-Request-Handler-boringproxy-/blob/master/README.md
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/boringproxy-resource-exhaustion-dos-via-get-loading-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00336
epssPercentile: 0.24244
ingestedAt: '2026-09-24T20:51:40.182Z'
---

## Overview

boringproxy through 0.10.0 contains a resource exhaustion vulnerability that allows any authenticated user to permanently exhaust server file descriptors, goroutines, and memory by sending requests to the GET /loading endpoint with attacker-supplied id query parameter values. Because the handler performs no map-lookup validity check and receives on a nil channel that blocks forever, with no timeout, no context cancellation, and no server-side reclamation due to absent HTTP server timeouts, each malicious request permanently holds one goroutine, one file descriptor, and approximately 50 kB of memory until the server's file descriptor limit is reached and listener Accept calls fail, halting all tunnel traffic forwarding for all users.

## Remediation

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