VYPR
Moderate severityNVD Advisory· Published Mar 24, 2026· Updated Mar 26, 2026

Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service

CVE-2026-33320

Description

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/tomwright/dasel/v3Go
>= 3.0.0, < 3.3.23.3.2

Affected products

3

Patches

Vulnerability mechanics

References

3

News mentions

0

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