CVE-2021-4235

Denial of service in gopkg.in/yaml.v2

State: Published
Severity: 5.5 Medium
Published: Dec 27, 2022
Updated: Apr 11, 2025
Reserved: Jul 29, 2022

Description

Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
gopkg.in/yaml.v2gopkg.in/yaml.v2	before 2.2.3Affected
github.com/go-yaml/yamlgithub.com/go-yaml/yaml

References

https://github.com/go-yaml/yaml/pull/375
https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241
https://pkg.go.dev/vuln/GO-2021-0061
https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html

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