CVE-2026-48107
Russh: Unchecked keyboard-interactive prompt count in client auth path
6.5
MEDIUM
CVSS 3.1
Description
Russh is a Rust SSH client & server library. From version 0.37.0 to before version 0.61.0, in the russh client keyboard-interactive authentication path, a malicious SSH server could send a USERAUTH_INFO_REQUEST with an attacker-controlled prompt count, and the client would use that raw count directly in Vec::with_capacity(...) before validating that enough prompt data was actually present in the packet. This issue has been patched in version 0.61.0.
How to fix CVE-2026-48107
To remediate CVE-2026-48107, upgrade the affected package to a fixed version below.
- —upgrade to 0.61.0 or later
- —no fix listed
Is CVE-2026-48107 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-48107.
Affected packages (2)
- >= 0.37.0, < 0.61.0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |