What is GHSA-h8q6-7rjx-3m2r?

GHSA-h8q6-7rjx-3m2r is a security advisory published by GitHub Security Advisories with Critical severity. lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to...

Which CVE IDs does GHSA-h8q6-7rjx-3m2r cover?

GHSA-h8q6-7rjx-3m2r covers the following CVE IDs: CVE-2026-87121. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-h8q6-7rjx-3m2r?

GHSA-h8q6-7rjx-3m2r has a CVSS v3 base score of 9.8, published by GitHub Security Advisories.

GHSA-h8q6-7rjx-3m2rCriticalCVSS 9.8

lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to...

Vendor

GitHub Security Advisories

Published

September 22, 2026

Last Modified

September 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-87121 →

📋 Description

lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device.

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2026-87121
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-265-01.json
https://savannah.nongnu.org/projects/lwip
https://www.cisa.gov/news-events/ics-advisories/icsa-26-265-01
https://github.com/advisories/GHSA-h8q6-7rjx-3m2r