Browserslist up to 4.28.6 index.js parseQueries resource consumption

Summaryinfo

A vulnerability classified as problematic was found in Browserslist up to 4.28.6. Affected by this vulnerability is the function parseQueries of the file index.js. Such manipulation leads to resource consumption. This vulnerability is referenced as CVE-2026-73089. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Browserslist up to 4.28.6 and classified as problematic. Affected by this issue is the function parseQueries of the file index.js. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-73089 since 08/10/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 4.28.7 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Browserslist

Version

• 4.28.0
• 4.28.1
• 4.28.2
• 4.28.3
• 4.28.4
• 4.28.5
• 4.28.6

Website

• Product: https://github.com/browserslist/browserslist/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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