CVE-2020-1920

Name: CVE-2020-1920
Creator: NVD / NIST
Published: 2021-06-01T14:15:08.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.36%

Last modified Jun 17, 2026

CVE-2020-1920 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A regular expression denial of service (ReDoS) vulnerability in the validateBaseUrl function can cause the application to use excessive resources, become unresponsive, or crash. This was introduced in react-native version 0.59.0 and fixed in version 0.64.1.. EPSS estimates a 1.36% chance of exploitation in the next 30 days.

Description

A regular expression denial of service (ReDoS) vulnerability in the validateBaseUrl function can cause the application to use excessive resources, become unresponsive, or crash. This was introduced in react-native version 0.59.0 and fixed in version 0.64.1.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.36%

68.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Facebook	React-Native	>= 0.59.0, < 0.64.1

References

https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7Patch, Third Party Advisory
https://github.com/facebook/react-native/releases/tag/v0.64.1Release Notes, Third Party Advisory
https://github.com/facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7Patch, Third Party Advisory
https://github.com/facebook/react-native/releases/tag/v0.64.1Release Notes, Third Party Advisory

Timeline

Published: Jun 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-1920?

How severe is CVE-2020-1920?

CVE-2020-1920 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.36% probability of exploitation in the next 30 days.

How do I fix CVE-2020-1920?

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-2020-1920?

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

Scan your code now

Source: NVD / NIST