What’s Vulnerable › Vulnerabilities
CVE-2026-48107: Russh: Unchecked keyboard-interactive prompt count in client auth path
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-10 · updated 2026-07-23
- Weakness: CWE-20
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.
Affected products
- Eugeny russh: from 0.37.0, < 0.61.0
References
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