CVE-2021-23364

CVE-2021-23364 is a medium-severity vulnerability in Browserslist Project Browserslist with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.

Key facts

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.

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.
How severe is CVE-2021-23364?
CVE-2021-23364 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-23364 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23364?
CVE-2021-23364 affects Browserslist Project Browserslist. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23364?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23364 published?
CVE-2021-23364 was published on 2021-04-28 and last updated on 2026-06-17.

References

Affected products (1)

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