CVE-2026-45149

node-brace-expansion: The brace-expansion library generates arbitrary strings containing a common prefix and suffix

CVE-2026-45149 is fixed in node-brace-expansion on 1 platform by DEBIAN-CVE-2026-45149 (version 2.0.3+~1.1.2-3), released June 27, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.5
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0030
22nd percentile

The brace-expansion library generates arbitrary strings containing a common prefix and suffix. From 5.0.0 to before 5.0.6, 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. This vulnerability is fixed in 5.0.6.

Where it's fixed

ProductFixed inFixReleased
Linux
node-brace-expansion · Debian 14 2.0.3+~1.1.2-3 DEBIAN-CVE-2026-45149 Jun 27, 2026

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