Security vulnerabilities and automated fixes for ssh issues
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CVE-2026-39827 is a high-severity resource exhaustion vulnerability in `golang.org/x/crypto` where an authenticated SSH client can repeatedly open channels to consume server resources without bound. The vulnerability was present in the `cloud/gcp/functions/acmedns` module at version `v0.49.0` and was resolved by upgrading to `v0.52.0`. Left unpatched, this flaw could allow an attacker with valid SSH credentials to degrade or deny service to other users of the affected GCP Cloud Function.
A high-severity denial of service vulnerability (CVE-2025-22869) was discovered in the SSH key exchange implementation of Go's `golang.org/x/crypto` library. The `cpdaemon` service depended on the vulnerable version v0.32.0, which could allow an attacker to exhaust server resources during the SSH handshake phase. The fix upgrades the dependency to v0.35.0, which includes the upstream patch for this vulnerability.