---
id: CVE-2026-70615
title: >-
  boringproxy through 0.10.0 contains a newline injection vulnerability that
  allows authenticated low-privileged users with tunnel-creation permission to
  inject arbitrary lines into the server account's SSH authorized_keys file by
  supplyin…
summary: >-
  boringproxy through 0.10.0 contains a newline injection vulnerability that
  allows authenticated low-privileged users with tunnel-creation permission to
  inject arbitrary lines into the server account's SSH authorized_keys file by
  supplyin…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-93
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-2026-70615'
references:
  - url: >-
      https://github.com/theopaid/Remote-Code-Execution-And-Privilege-Escalation-Through-SSH-Authorized-Keys-Injection-boringproxy-/blob/master/README.md
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/boringproxy-ssh-authorized-keys-injection-via-tunnel-creation
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00351
epssPercentile: 0.26015
ingestedAt: '2026-09-24T20:51:40.181Z'
---

## Overview

boringproxy through 0.10.0 contains a newline injection vulnerability that allows authenticated low-privileged users with tunnel-creation permission to inject arbitrary lines into the server account's SSH authorized_keys file by supplying a percent-encoded newline character in the domain parameter of the tunnel creation endpoint. Attackers can insert an unrestricted public key entry into authorized_keys to gain persistent shell access, and subsequently read cleartext credentials from the database file including all user tokens, tunnel private keys, and TLS certificates.

## Remediation

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