What’s Vulnerable › Vulnerabilities

CVE-2021-33195

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-02 · updated 2026-06-17
• Weakness: CWE-74

Description

Go before 1.15.13 and 1.16.x before 1.16.5 has functions for DNS lookups that do not validate replies from DNS servers, and thus a return value may contain an unsafe injection (e.g., XSS) that does not conform to the RFC1035 format.

Affected products

• Go: before 1.15.13; from 1.16.0 before 1.16.5 — fixed in 1.15.13, 1.16.5
• NetApp Cloud Insights Telegraf Agent: all versions

How to fix

Upgrade to a fixed version: Go 1.15.13, 1.16.5. Check the vendor advisory for mitigations.

References

• https://groups.google.com/g/golang-announce
• https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI
• https://security.gentoo.org/glsa/202208-02
• https://security.netapp.com/advisory/ntap-20210902-0005/
• https://groups.google.com/g/golang-announce
• https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI
• https://security.gentoo.org/glsa/202208-02
• https://security.netapp.com/advisory/ntap-20210902-0005/

Get alerted when CVE-2021-33195 or the next vulnerability affects your stack