# CVE-2026-73089: Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM

> CVE-2026-73089: Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-73089
Last updated: 2026-09-09T20:44:04Z

- Published: 2026-08-11 17:05 UTC · Updated: 2026-09-09 20:44 UTC · Assigner: GitHub\_M
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.66%, 51th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-770

## 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.

## Affected vendors and products

- browserslist: browserslist

## Tracked companies

- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-73089)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-73089)
- [https://github.com/browserslist/browserslist/commit/f2931a3ff2a3a31abf84ef01a7400b270aad6405](https://github.com/browserslist/browserslist/commit/f2931a3ff2a3a31abf84ef01a7400b270aad6405)
- [https://github.com/browserslist/browserslist/releases/tag/4.28.7](https://github.com/browserslist/browserslist/releases/tag/4.28.7)
- [https://github.com/browserslist/browserslist/security/advisories/GHSA-c83g-rgw3-j3cx](https://github.com/browserslist/browserslist/security/advisories/GHSA-c83g-rgw3-j3cx)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-73089 · Markdown: https://rewindex.com/cve/CVE-2026-73089.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-73089 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:31.514Z