What is GHSA-5769-g37j-m8jq?

GHSA-5769-g37j-m8jq is a security advisory published by GitHub Security Advisories with Critical severity. Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in...

Which CVE IDs does GHSA-5769-g37j-m8jq cover?

GHSA-5769-g37j-m8jq covers the following CVE IDs: CVE-2026-111711. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-5769-g37j-m8jq?

GHSA-5769-g37j-m8jq has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-5769-g37j-m8jqCriticalCVSS 9.8

Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in...

Vendor

GitHub Security Advisories

Published

October 16, 2026

Last Modified

October 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-111711 →

📋 Description

Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in the Boa web server's user_ok() function, which copies Basic-auth usernames with unbounded strcpy() calls into 64-byte stack buffers. Unauthenticated attackers can send a username longer than 63 bytes to any protected /router/*.cgi route to crash the main Boa process or potentially execute code.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-111711
https://github.com/lukadqq/netcore-router-public-refs/blob/a44d562736b41c944223297e9144d2ad7fa2aff1/2026.10.15-netcore-nr256cn-basic-auth-stack-overflow.md
https://www.vulncheck.com/advisories/netcore-nr256cn-through-1.5.140116-pre-auth-stack-overflow-via-boa-user-ok
https://github.com/advisories/GHSA-5769-g37j-m8jq