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Vulnerabilities CVE-2026-73089

CVE-2026-73089

High
Open
TLP:CLEAR

Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM

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Description

Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, index.js retains every distinct `(queries, context)` result in cache and every parseQueries() AST in parseCache without a size cap, TTL, or eviction, allowing an attacker who can influence repeated browserslist() query values, including valid since `<year>-<month>-<day>` queries, to bypass the caller-controlled BROWSERSLIST_DISABLE_CACHE mitigation and cause linear memory growth followed by an out-of-memory process crash. This issue is fixed in version 4.28.7.

Details

CVSS Score
7.5
EPSS Score
0.36%

28.9th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Aug 11, 2026
Last Modified
Aug 13, 2026
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