CVE-2026-48107
Russh: Unchecked keyboard-interactive prompt count in client auth path
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-20 |
| Vendor | eugeny |
| Product | russh |
| Published | Jun 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Eugeny / russh
>= 0.37.0, < 0.61.0