CVE-2026-70615

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.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/theopaid/Remote-Code-Execution-And-Privilege-Escalation-Through-SSH-Authorized-Keys-Injection-boringproxy-/blob/master/README.md
https://www.vulncheck.com/advisories/boringproxy-ssh-authorized-keys-injection-via-tunnel-creation

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-05 20:17

Updated : 2026-08-06 22:18

NVD link : CVE-2026-70615

Mitre link : CVE-2026-70615

CVE.ORG link : CVE-2026-70615

JSON object : View

Products Affected

No product.

CWE

CWE-93

Improper Neutralization of CRLF Sequences ('CRLF Injection')

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