What is GHSA-4846-7xwg-pw5m?

GHSA-4846-7xwg-pw5m is a security advisory published by GitHub Security Advisories with Medium severity. A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size...

Which CVE IDs does GHSA-4846-7xwg-pw5m cover?

GHSA-4846-7xwg-pw5m covers the following CVE IDs: CVE-2026-59843. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-4846-7xwg-pw5m?

GHSA-4846-7xwg-pw5m has a CVSS v3 base score of 6.5, published by GitHub Security Advisories.

GHSA-4846-7xwg-pw5mMediumCVSS 6.5

A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size...

Vendor

GitHub Security Advisories

Published

July 21, 2026

Last Modified

July 21, 2026

🔗 CVE IDs covered (1)

CVE-2026-59843 →

📋 Description

A flaw was found in libssh. A remote authenticated peer can advertise a zero maximum packet size in SSH_MSG_CHANNEL_OPEN, causing later channel writes to loop indefinitely and consume CPU, leading to denial of service.

🔗 References (4)

https://nvd.nist.gov/vuln/detail/CVE-2026-59843
https://access.redhat.com/security/cve/CVE-2026-59843
https://bugzilla.redhat.com/show_bug.cgi?id=2498176
https://github.com/advisories/GHSA-4846-7xwg-pw5m