VULNRABLE / Vulnerability / CVE-2026-102821

CVE-2026-102821

MEDIUM LOW russh GHSA

Exploit verdict: No active-exploit signal

CVSS Score

5.5

Severity

MEDIUM

EPSS

Source

GHSA

Summary

Russh: Unbounded memory exhaustion via CHANNEL_OPEN flood during a client-stalled rekey

What this means

CVE-2026-102821 is a medium-severity vulnerability affecting russh, rated CVSS 5.5. The EPSS model estimates a 0% probability of exploitation in the next 30 days. Published October 1, 2026.

View full advisory at GHSA →