CVE-2026-70616

MediumCVSS 6.5

Published: 05/08/2026(UTC)Updated: 06/08/2026(UTC)Translated: 06/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.20%

10th percentile - higher than 10% of all known CVEs

Summary

boringproxy through version 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. Each malicious request permanently holds one file descriptor, one goroutine, and approximately 50 kB of memory until the server's file descriptor limit is reached, halting all tunnel traffic forwarding for all users.

Risk Assessment

The attack can lead to complete shutdown of the tunneling service, potentially affecting availability for all users.

Recommendation

Update boringproxy to a patched version or restrict access to the /loading endpoint.

Other vulnerabilities in boringproxy

CVE-2026-70615Critical
boringproxy through 0.10.0 contains a newline injection vulnerability that allows authenticated low-privileged users to inject arbitrary lines into the server's authorized_keys file. Attackers can insert a public key, gaining persistent shell access and reading credentials from the database.

Original NVD description (English source)

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.