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Vulnerability record · CVE-2026-48110 · published 10 June 2026

CVE-2026-48110: Improper input validation vulnerability

Russh is a Rust SSH client & server library. From version 0.34.0 to before version 0.61.0, several russh client and server message handlers decoded attacker-controlled SSH strings, name-lists, and byte fields into owned allocations before applying field-specific bounds. A remote SSH peer could send oversized, high-fanout, or malformed length-prefixed fields and make the library allocate, attempt to allocate, or split data before rejecting input that should have been rejected earlier. This issue has been patched in version 0.61.0.

7.5 CVSS 3.1 High EPSS 0.46% · top 62.6% CWE-20 · Improper input validation Deferred
7.5CVSS 3.1 base score
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
23 Jul 2026Last modified by NVD

Description

Russh is a Rust SSH client & server library. From version 0.34.0 to before version 0.61.0, several russh client and server message handlers decoded attacker-controlled SSH strings, name-lists, and byte fields into owned allocations before applying field-specific bounds. A remote SSH peer could send oversized, high-fanout, or malformed length-prefixed fields and make the library allocate, attempt to allocate, or split data before rejecting input that should have been rejected earlier. This issue has been patched in version 0.61.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

LinkTags
https://github.com/Eugeny/russh/security/advisories/GHSA-4r3c-5hpg-58qr
https://github.com/Eugeny/russh/security/advisories/GHSA-4r3c-5hpg-58qr

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Source: NIST National Vulnerability Database (record CVE-2026-48110), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.