CVE-2026-70615

Critical

Description

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.

SeverityCritical
CVSS9.9
Exploit probability—
ProductBoringproxy
PublishedAug 5, 2026
First seenAug 5, 2026
Weakness typeCWE-93CWE-93

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
boringproxy boringproxyv ≤ 0.10.0—

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