CVE-2021-29418

The netmask package before 2.0.1 for Node.js mishandles certain unexpected characters in an IP address string, such as an octal digit of 9. This (in some situations) allows attackers to bypass access control that is based on IP addresses. NOTE: this issue exists because of an incomplete fix for CVE-2021-28918.

• CWE-20

• https://github.com/rs/node-netmask/commit/3f19a056c4eb808ea4a29f234274c67bc5a848f4Patch, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210604-0001/Third Party Advisory
• https://vuln.ryotak.me/advisories/6Third Party Advisory
• https://github.com/rs/node-netmask/commit/3f19a056c4eb808ea4a29f234274c67bc5a848f4Patch, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210604-0001/Third Party Advisory
• https://vuln.ryotak.me/advisories/6Third Party Advisory

Published

Mar 30, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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