MEDIUM6.5
GHSA-jxxr-4gwj-5jf2
brace-expansion: Large numeric range defeats documented `max` DoS protection
Quick fix
GHSA-jxxr-4gwj-5jf2 — brace-expansion: upgrade to the fixed version with the command below.
npm install brace-expansion@5.0.6Details
The `max` option was being applied too late:
When expanding a single large numeric range like `{1..10000000}`, the sequence generation loop generates all 10 million intermediate elements before the `max` limit is applied With `max=10`, the output is correctly limited to 10 items, but the process still allocates `~505 MB` and spends `~800ms` building the full intermediate array.
### Workaround
Ensure the string to be expanded doesn't contain more values than the desired `max` item count.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-jxxr-4gwj-5jf2[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-45149[ADVISORY]
- https://github.com/juliangruber/brace-expansion/commit/c0b095bdc52bc4c36dc88deddbadabc49f8371e5[WEB]
- https://github.com/juliangruber/brace-expansion[PACKAGE]