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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2026-45149

brace-expansion: Large numeric range defeats documented `max` DoS protection

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

juliangruber brace-expansion

  • >= 5.0.0, < 5.0.6affected

References