Vulnerability in Facebook React-Native
CVE-2020-1920
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.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.014 (68.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Facebook React-native — versions 0.64.1, 0.59.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve-assign@fb.com (x_refsource_CONFIRM, Third Party Advisory, Release Notes)
- cve-assign@fb.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-1920?
- CVE-2020-1920 is a high-severity vulnerability in Facebook React-Native, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2021-06-01.
- How severe is CVE-2020-1920?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-1920 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.