What is GHSA-5x4f-h328-9vjh?

GHSA-5x4f-h328-9vjh is a security advisory published by GitHub Security Advisories with Critical severity. lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.

Which CVE IDs does GHSA-5x4f-h328-9vjh cover?

GHSA-5x4f-h328-9vjh covers the following CVE IDs: CVE-2026-15340. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-5x4f-h328-9vjh?

GHSA-5x4f-h328-9vjh has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-5x4f-h328-9vjhCriticalCVSS 9.8

lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.

Vendor

GitHub Security Advisories

Published

October 9, 2026

Last Modified

October 9, 2026

🔗 CVE IDs covered (1)

CVE-2026-15340 →

📋 Description

lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-15340
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-279-02.json
https://www.cisa.gov/news-events/ics-advisories/icsa-26-279-02
https://github.com/advisories/GHSA-5x4f-h328-9vjh