CVE-2020-14039

Name: CVE-2020-14039
Creator: NVD / NIST
Published: 2020-07-17T16:15:11.327+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.76%

Last modified Jun 17, 2026

CVE-2020-14039 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In Go before 1.13.13 and 1.14.x before 1.14.5, Certificate.Verify may lack a check on the VerifyOptions.KeyUsages EKU requirements (if VerifyOptions.Roots equals nil and the installation is on Windows). Thus, X.509 certificate verification is incomplete.. EPSS estimates a 1.76% chance of exploitation in the next 30 days.

Description

In Go before 1.13.13 and 1.14.x before 1.14.5, Certificate.Verify may lack a check on the VerifyOptions.KeyUsages EKU requirements (if VerifyOptions.Roots equals nil and the installation is on Windows). Thus, X.509 certificate verification is incomplete.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.76%

75.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Golang	Go	< 1.13.13
Golang	Go	>= 1.14.0, < 1.14.5
Opensuse	Leap	15.1
Opensuse	Leap	15.2

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00077.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00082.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00029.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00030.htmlMailing List, Third Party Advisory
https://groups.google.com/forum/#%21forum/golang-announce
https://groups.google.com/forum/#%21topic/golang-announce/XZNfaiwgt2w
https://security.netapp.com/advisory/ntap-20200731-0005/Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00077.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00082.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00029.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00030.htmlMailing List, Third Party Advisory
https://groups.google.com/forum/#%21forum/golang-announce
https://groups.google.com/forum/#%21topic/golang-announce/XZNfaiwgt2w
https://security.netapp.com/advisory/ntap-20200731-0005/Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory

Timeline

Published: Jul 17, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-14039?

How severe is CVE-2020-14039?

CVE-2020-14039 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.76% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14039?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-14039?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST