Regular expression denial of service in react-native

Also known as GHSA-7f53-fmmv-mfjv

Published 5 y ago 2021-06-01 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.5

v3.1 · NVD

CISA KEV

not known exploited

EPSS

1.4%

percentile 72%

Public exploits

none known

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.

Exploit prediction (EPSS)

1.36% probability of exploitation in the next 30 days, higher than 72% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:N/I:N/A:P`
GitHub	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Affected packages

Ecosystem	Package	Affected	Fixed in
npm	`react-native`	>=0.59.0, <0.62.3 >=0.63.0, <0.64.1	0.62.3 0.64.1

Affected products

Facebook react-native

Classification

Weakness

CWE-1333 Inefficient Regular Expression Complexity
CWE-697 Incorrect Comparison
CWE-400 Uncontrolled Resource Consumption

References

github.com /facebook/react-native/releases/tag/v0.64.1 · x_refsource_CONFIRM, x_transferred
github.com /facebook/react-native/commit/ca09ae82715e33c9ac77b3fa55495cf84ba891c7 · x_refsource_MISC, x_transferred
nvd.nist.gov /vuln/detail/CVE-2020-1920 · advisory
github.com /facebook/react-native/releases/tag/v0.62.3 · web
securitylab.github.com /advisories/GHSL-2020-293-redos-react-native · advisory
npmjs.com /package/react-native · web

Sources

CVE List: CVE-2020-1920
GitHub Advisory: GHSA-7f53-fmmv-mfjv
NVD: CVE-2020-1920

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary