CVE-2022-1471

Publication date 1 December 2022

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

SnakeYaml's Constructor() class does not restrict types which can be instantiated during deserialization. Deserializing yaml content provided by an attacker can lead to remote code execution. We recommend using SnakeYaml's SafeConsturctor when parsing untrusted content to restrict deserialization. We recommend upgrading to version 2.0 and beyond.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
snakeyaml	24.10 oracular	Ignored end of life, was ignored [backport infeasible]
	24.04 LTS noble	Ignored backport infeasible
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Ignored end of life, was needs-triage
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Ignored backport infeasible
	20.04 LTS focal	Ignored backport infeasible
	18.04 LTS bionic	Ignored backport infeasible
	16.04 LTS xenial	Ignored backport infeasible
	14.04 LTS trusty	Ignored backport infeasible

Notes

eslerm

upstream bug report declares this a documentation issue

john-breton

A secure by default change was made in version 2.0, but the version is not backwards compatible and considered breaking by upstream. It cannot be used to patch the vulnerability in this case, and the documentation is already clear to avoid this issue.

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H