Fleet

A vulnerability in Fleet's agent-side deployer (CVE-2026-44938) allows an attacker with `git push` access to a Fleet-monitored repository to overwrite Pod Security Standards (PSS) enforcement labels on target Kubernetes namespaces, bypassing admission controls and enabling the deployment of otherwise prohibited workloads.

An unauthenticated regex injection vulnerability exists in Rancher Fleet's webhook endpoint when it's configured without a secret, allowing attackers to forge webhook requests using unsanitized repository URL components, which leads to continuous repository re-cloning, causing network and resource exhaustion (Denial of Service) on the management cluster, and potentially service downgrades if the attacker has read access to the target Git repository.

Fleet server versions prior to 4.81.0 are vulnerable to a denial-of-service (DoS) via the gRPC Launcher `PublishLogs` endpoint, where unexpected input values can cause the server process to terminate upon receiving a crafted request from an authenticated Launcher host.

Fleet's Helm deployer did not fully apply ServiceAccount impersonation in two code paths, allowing a tenant with git push access to a Fleet-monitored repository to read secrets from any namespace on every downstream cluster targeted by their `GitRepo`.

Multiple vulnerabilities in Fleet allow an attacker to perform SQL injection, denial of service, bypass security measures, disclose information, and execute arbitrary program code with administrator privileges.