CVE-2026-69152

A flaw was found in the brace-expansion library. The expand() function does not apply maxLength when constructing comma-alternative intermediate arrays or padded sequences, allowing attacker-controlled input to exhaust memory or block the event loop, resulting in a denial of service. This issue is due to an incomplete mitigation of CVE-2026-14257.

Any applications that pass user-controlled input to the expand() function are vulnerable to this issue. This flaw can result in an excessive consumption of memory that eventually terminates the process or blocks the event loop, both causing a denial of service. As this vulnerability allows a remote attacker to cause a denial of service, it has been rated with an important severity.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this vulnerability, do not pass untrusted input to the expand() function.