HIGH

CVE-2026-102823

CVSS v3

7.5

HIGH

EPSS Score

0.3 %

exploit probability, as of 2026-09-30

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

Russh is a Rust SSH client and server library. Prior to 0.63.1, client_read_authenticated in russh/src/client/encrypted.rs forwards CHANNEL_DATA, CHANNEL_EXTENDED_DATA, CHANNEL_EOF, CHANNEL_CLOSE, CHANNEL_OPEN_FAILURE, CHANNEL_SUCCESS, CHANNEL_FAILURE, and CHANNEL_REQUEST subtypes exit-status, exit-signal, and xon-xoff to public client::Handler callbacks without confirming that the ChannelId belongs to a channel the client opened and established. A malicious SSH server can send lifecycle events

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: 2026-09-29
Last Modified: 2026-09-29

Frequently asked questions

What is CVE-2026-102823?

Is CVE-2026-102823 actively exploited?

Active exploitation of CVE-2026-102823 has not been confirmed. Its EPSS score was 0.3% on 2026-09-30, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-102823?

CVE-2026-102823 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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