CVE-2026-45149
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk13th percentile - higher than 13% of all known CVEs
Summary
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. From versions 5.0.0 to before 5.0.6, the max option was applied too late, leading to the generation of all elements in a large numeric range before the limit was enforced.
Risk Assessment
Organizations may experience excessive memory and CPU usage when generating large ranges, potentially leading to performance issues.
Recommendation
It is recommended to upgrade to version 5.0.6 or later to fix this vulnerability and avoid performance problems.
Original NVD description (English source)
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.