CVE-2021-4235

medium

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.

References

Advisories
More

https://pkg.go.dev/vuln/GO-2021-0061

https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241

https://lists.debian.org/debian-lts-announce/2023/07/msg00001.html

https://github.com/go-yaml/yaml/pull/375

Details

Source: Mitre, NVD

Published: 2022-12-27

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H