Security vulnerabilities and automated fixes for docker issues
4 posts found
A critical command injection vulnerability in the Docker RPC handler allowed authenticated attackers to execute arbitrary system commands by injecting shell metacharacters into container ID, port, user ID, or command parameters. The fix validates all user-supplied inputs against strict whitelist patterns before interpolating them into shell commands.
The `opensearch` service defined in `Docker/LocalCluster.s3.yaml` was running with a fully writable root filesystem, giving any process inside the container the ability to modify binaries, drop payloads, or persist malicious changes. The fix pins the container to a read-only root filesystem with `read_only: true`, closing off a common post-compromise persistence and tampering vector while preserving normal OpenSearch operation.
CVE-2026-26217 is a critical Local File Inclusion (LFI) vulnerability in Crawl4AI versions prior to 0.8.0, where the Docker API fails to restrict `file://` URL schemes, allowing attackers to read arbitrary files from the host filesystem. The fix upgrades `crawl4ai` from `0.7.6` to `0.8.0` in `pyproject.toml` and `uv.lock`, closing a direct path to sensitive file exfiltration in any containerized deployment using this library.
A high-severity privilege escalation vulnerability was discovered in a Docker Compose configuration where the `nginx` service lacked the `no-new-privileges` security option and was running with a writable root filesystem. These misconfigurations could allow a compromised container process to gain elevated permissions or download and execute malicious payloads. The fix applies defense-in-depth by adding `no-new-privileges:true`, enforcing a read-only root filesystem, and redirecting writable path