CVE-2026-48110

HIGH

Russh: SSH message fields were decoded through allocation-first parsers before field-specific bounds

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0027
EPSS Percentile 18.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (2)
crates.io/russh 0.34.0 - 0.61.0crates.io
Eugeny/russh >= 0.34.0, < 0.61.0
Published Jun 10, 2026
Tracked Since Jun 11, 2026