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CVE-2026-45149

6.5 MEDIUM

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

Published: 2026-05-29 · Last updated: 2026-06-12

Severity and scoring

CVSS
6.5 MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
CWE-400

Affected products

VendorProduct
juliangruberbrace-expansion

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.

Source: NVD

References

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