CVE-2026-102823

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Source

https://cve.org/CVERecord?id=CVE-2026-102823

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102823.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-102823

Aliases

GHSA-47hw-gvq5-r2gm

Downstream

Published

2026-09-29T18:25:58Z

Modified

2026-10-21T02:52:26Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator

Summary

russh: Client-side channel-scoped Handler callbacks fire for channel IDs the client never opened

Details

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 for predicted, unopened, unconfirmed, or released channel identifiers, causing application panics or corrupting command completion and exit-code tracking. This issue is fixed in version 0.63.1.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-20"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102823.json"
}

References

Affected packages

Git / github.com/eugeny/russh

Affected ranges

Type

GIT

Repo

https://github.com/eugeny/russh

Events

Introduced

Fixed

d3ae702a43a163946f258297e398dc216339d5ce

Fixed

3430fd26ecafc0dc3705210f5f39a9119fa22774

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "0.63.1"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "3430fd26ecafc0dc3705210f5f39a9119fa22774"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v0.63.1",
            "range":  [
                {
                    "fixed":  "d3ae702a43a163946f258297e398dc216339d5ce"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

0.*

0.37.0-beta.1

v0.*

v0.34.0

v0.35.0-beta.1

v0.35.0-beta.2

v0.35.0-beta.3

v0.35.0-beta.5

v0.35.0-beta.6

v0.35.0-beta.7

v0.35.0-beta.8

v0.35.0-beta.9

v0.36.1

v0.37.0

v0.37.0-beta.1

v0.37.1

v0.38.0

v0.38.0-beta.1

v0.39.0-beta.1

v0.40.0

v0.40.1

v0.40.2

v0.42.0

v0.43.0

v0.43.0-beta.1

v0.44.0

v0.44.0-beta.1

v0.44.0-beta.3

v0.44.0-beta.4

v0.45.0

v0.46.0

v0.47.0-beta.3

v0.47.0-beta.4

v0.48.0

v0.48.1

v0.48.2

v0.49.0

v0.50.0

v0.50.0-beta.10

v0.50.0-beta.11

v0.50.0-beta.12

v0.50.0-beta.2

v0.50.0-beta.3

v0.50.0-beta.4

v0.50.0-beta.5

v0.50.0-beta.6

v0.50.0-beta.7

v0.50.0-beta.8

v0.50.0-beta.9

v0.50.1

v0.50.3

v0.50.4

v0.51.0

v0.51.0-beta.1

v0.51.0-beta.2

v0.51.0-beta.3

v0.51.1

v0.52.0

v0.52.0-beta.1

v0.52.1

v0.53.0

v0.53.0-beta.1

v0.54.0

v0.54.1

v0.54.2

v0.54.3

v0.54.4

v0.54.5

v0.54.6

v0.55.0

v0.56.0

v0.57.0

v0.57.1

v0.58.0

v0.59.0

v0.60.0

v0.60.1

v0.60.2

v0.60.3

v0.61.0

v0.61.1

v0.61.2

v0.62.0

v0.62.1

v0.62.2

v0.62.3

v0.62.4

v0.62.5

v0.62.6

v0.62.7

v0.63.0

v0.63.0-beta.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102823.json"