UBUNTU-CVE-2026-33320

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Source

https://ubuntu.com/security/CVE-2026-33320

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33320.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-33320

Upstream

CVE-2026-33320

Published

2026-03-24T01:17:00Z

Modified

2026-04-02T17:31:26Z

Severity

6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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.

References

Affected packages

Ubuntu:Pro:24.04:LTS / dasel

Package

Name: dasel
Purl: pkg:deb/ubuntu/dasel@2.6.0-1ubuntu0.3+esm2?arch=source&distro=esm-apps/noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.6.0-1

2.6.0-1build1

2.6.0-1ubuntu0.1

2.6.0-1ubuntu0.2

2.6.0-1ubuntu0.2+esm1

2.6.0-1ubuntu0.3

2.6.0-1ubuntu0.3+esm1

2.6.0-1ubuntu0.3+esm2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "dasel",
            "binary_version": "2.6.0-1ubuntu0.3+esm2"
        },
        {
            "binary_name": "golang-github-tomwright-dasel-dev",
            "binary_version": "2.6.0-1ubuntu0.3+esm2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33320.json"

Ubuntu:25.10 / dasel