MEDIUM

CVE-2021-23364

CVSS v3

5.3

MEDIUM

EPSS Score

2.5 %

exploit probability, as of 2026-10-17

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

browserslistnpmfrom 4.0.0 · fixed in 4.16.5

Vendor advisories

CVE-2021-23364 Red Hat Product Security1 product fixed · 17 known affected
browserslist: parsing of invalid queries could result in Regular Expression Denial of Service (ReDoS)
servicemesh-grafana as a component of OpenShift Service Mesh 2.0 · servicemesh-grafana-prometheus as a component of OpenShift Service Mesh 2.0 · servicemesh-grafana.src as a component of OpenShift Service Mesh 2.0
RHSA-2021:3917 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat Quay v3.6.0 security, bug fix and enhancement update

Full record on NVD

Description

The package browserslist from 4.0.0 and before 4.16.5 are vulnerable to Regular Expression Denial of Service (ReDoS) during parsing of queries.

Technical details

Published: 2021-04-28

Frequently asked questions

What is CVE-2021-23364?

The package browserslist from 4.0.0 and before 4.16.5 are vulnerable to Regular Expression Denial of Service (ReDoS) during parsing of queries.

Is CVE-2021-23364 actively exploited?

Active exploitation of CVE-2021-23364 has not been confirmed. Its EPSS score was 2.5% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23364?

CVE-2021-23364 has a CVSS v3 base score of 5.3 (MEDIUM severity).

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