Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service
Summary
Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service
Original description
The description as published by the source.
Dasel is a command-line tool and library for querying, modifying, and transforming data structures. Starting in version 3.0.0 and prior to version 3.3.1, Dasel's YAML reader allows an attacker who can supply YAML for processing to trigger extreme CPU and memory consumption. The issue is in the library's own UnmarshalYAML implementation, which manually resolves alias nodes by recursively following yaml.Node.Alias pointers without any expansion budget, bypassing go-yaml v4's built-in alias expansion limit. Version 3.3.2 contains a patch for the issue.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Ubuntu UBUNTU-CVE-2026-33320 dasel
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov