PT-2026-48545 · Eugeny · Russh

Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-48107

NVD

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2026-48107

Affected Products

Russh

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-48107 · Security Note
• https://github.com/Eugeny/russh/security/advisories/GHSA-g9g7-5cgw-6v28 · Note