CVE-2026-48110
Russh SSH message fields were decoded through allocation-first parsers before field-specific bounds
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.
How to fix CVE-2026-48110
To remediate CVE-2026-48110, upgrade the affected package to a fixed version below.
- —upgrade to 0.61.0 or later
- —no fix listed
Is CVE-2026-48110 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-48110.
Affected packages (2)
- >= 0.34.0, < 0.61.0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |