Browserslist: Unbounded memory growth (no cache eviction) via distinct query results, leading to eventual OOM — GHSA-C83G-RGW3-J3CX

Summary

## Vulnerability Details **File**: `index.js` **Location**: `cache` (browserslist()'s result cache, line ~402) and `parseCache` (parseQueries()'s AST cache) ### Root Cause ```js var cache = {} var parseCache = {} function browserslist(queries, opts) { ... var cacheKey = JSON.stringify([queries, context]) if (cache[cacheKey]) return cache[cacheKey] ... if (!env.env.BROWSERSLIST_DISABLE_CACHE) { cache[cacheKey] =…

Timeline

Published by source

2026-09-01

Risk context

• Reported severity or threat level: high.
• Reported CVSS score: 7.5 out of 10.
• Reported EPSS value: 0.0036.
• Review exposure for the affected product or family: npm: browserslist.

Product

npm: browserslist

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

GHSA-C83G-RGW3-J3CX

Source

GitHub

Vendor

GitHub

Published by source

2026-09-01

Last source activity

2026-09-01

Additional identifiers

CVE-2026-73089

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.