CVE-2020-8252

Name: CVE-2020-8252
Creator: NVD / NIST
Published: 2020-09-18T21:15:13.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2020-8252 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.. EPSS estimates a 0.71% chance of exploitation in the next 30 days.

Description

The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is longer than 256 bytes.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.71%

49.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nodejs	Node.Js	>= 10.0.0, < 10.22.1
Nodejs	Node.Js	>= 12.0.0, < 12.18.4
Nodejs	Node.Js	>= 14.0.0, < 14.9.0
Opensuse	Leap	15.2
Fedoraproject	Fedora	33

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.htmlMailing List, Third Party Advisory
https://hackerone.com/reports/965914Permissions Required, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/Vendor Advisory
https://security.gentoo.org/glsa/202009-15Third Party Advisory
https://security.netapp.com/advisory/ntap-20201009-0004/Third Party Advisory
https://usn.ubuntu.com/4548-1/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.htmlMailing List, Third Party Advisory
https://hackerone.com/reports/965914Permissions Required, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/Vendor Advisory
https://security.gentoo.org/glsa/202009-15Third Party Advisory
https://security.netapp.com/advisory/ntap-20201009-0004/Third Party Advisory
https://usn.ubuntu.com/4548-1/Third Party Advisory

Timeline

Published: Sep 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8252?

How severe is CVE-2020-8252?

CVE-2020-8252 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8252?

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-2020-8252?

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

Scan your code now

Source: NVD / NIST