What is CVE-2026-45149?

CVE-2026-45149 is a medium-severity vulnerability in Juliangruber Brace-expansion, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-05-29.

How severe is CVE-2026-45149?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Juliangruber Brace-expansion

CVE-2026-45149

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 seque…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.000 (12.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Juliangruber Brace-expansion — versions >= 5.0.0, < 5.0.6

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-45149?: CVE-2026-45149 is a medium-severity vulnerability in Juliangruber Brace-expansion, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-05-29.
How severe is CVE-2026-45149?: Medium severity. CVSS v3 base score is 6.5 out of 10.