CVE-2026-48107

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.

PUBLISHED Reserved 2026-05-20 | Published 2026-06-10 | Updated 2026-06-10 | Assigner GitHub_M

Problem types

CWE-20: Improper Input Validation

Product status

References

github.com/.../russh/security/advisories/GHSA-g9g7-5cgw-6v28

cve.org (CVE-2026-48107)

nvd.nist.gov (CVE-2026-48107)

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