There are 2 open security issues in bullseye.
2 important issues:
For GitLab Runner before 13.0.12, 13.1.6, 13.2.3, by replacing dockerd with a malicious server, the Shared Runner is susceptible to SSRF.
An issue has been discovered in GitLab Runner affecting all versions starting from 13.4.0 before 13.4.2, all versions starting from 13.3.0 before 13.3.7, all versions starting from 13.2.0 before 13.2.10. Insecure Runner Configuration in Kubernetes Environments