CVE-2026-119168
Description
A flaw was found in Nomad. This vulnerability can lead to privilege escalation when the service improperly follows symbolic links (symlinks) during same-client allocation data migration. An attacker running a malicious workload can exploit this flaw to modify the ownership and permissions of host directories. Consequently, this can allow unauthorized access to sensitive host data and modification of critical host files.
Statement
This vulnerability is evaluated with an Important impact because an authenticated attacker who can submit jobs could escape workload isolation and alter the host filesystem, resulting in a full host compromise. While exploitation necessitates existing workload scheduling privileges rather than unauthenticated network access, the resulting blast radius extends beyond the container boundary to the underlying operating system. HashiCorp Nomad is not distributed or maintained in Red Hat Enterprise Linux or Red Hat OpenShift, which relies on Kubernetes architecture for workload scheduling.
Understanding the Weakness (CWE)
Confidentiality,Integrity,Access Control
Technical Impact: Read Files or Directories; Modify Files or Directories; Bypass Protection Mechanism
An attacker may be able to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. If the files are used for a security mechanism then an attacker may be able to bypass the mechanism.
Other
Technical Impact: Execute Unauthorized Code or Commands
Windows simple shortcuts, sometimes referred to as soft links, can be exploited remotely since a ".LNK" file can be uploaded like a normal file. This can enable remote execution.
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