CVE-2026-68930— Russh: Channel-scoped server callbacks can be reached without an open channel
Quick assessment
Affected
Eugeny russh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Eugene Russh是Eugene个人开发者的一款SSH客户端库。 Eugene Russh 0.62.5之前版本存在安全漏洞，该漏洞源于在russh/src/server/encrypted.rs、server_read_authenticated和exec_request回调中，为从未打开或确认的接收者通道ID分发了通道范围的Handler回调，可能导致逻辑处理错误或未授权操作。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-68930
Vulnerability Information
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Vulnerability Title
Russh: Channel-scoped server callbacks can be reached without an open channel
Source: CVE Program / CVE List V5
Vulnerability Description
Russh is a Rust SSH client & server library. Prior to 0.62.5, russh dispatches channel-scoped Handler callbacks for recipient channel IDs that were never opened or confirmed in russh/src/server/encrypted.rs, server_read_authenticated, and the exec_request callback. Version 0.62.5 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在生命周期错误阶段对资源进行操作
Source: CVE Program / CVE List V5
Vulnerability Title
Eugene Russh 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eugene Russh是Eugene个人开发者的一款SSH客户端库。 Eugene Russh 0.62.5之前版本存在安全漏洞，该漏洞源于在russh/src/server/encrypted.rs、server_read_authenticated和exec_request回调中，为从未打开或确认的接收者通道ID分发了通道范围的Handler回调，可能导致逻辑处理错误或未授权操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-68930
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Patches & Fixes for CVE-2026-68930 (1)
Vendor Advisories for CVE-2026-68930 (1)
Vendor Pages for CVE-2026-68930 (1)
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🔗 Release v0.62.5 · Eugeny/russh · GitHub x_refsource_MISC
IV. Related Vulnerabilities
Same product: russh
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CVE-2026-102825
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CVE-2026-102821
Russh: Unbounded memory exhaustion via CHANNEL_OPEN flood du
Same vendor: Eugeny
-
CVE-2026-102825
Russh: Configured server auth-attempt cap is not enforced in -
CVE-2026-102824
Russh: Missing X25519 zero-point validation in hybrid ML-KEM -
CVE-2026-102823
russh: Client-side channel-scoped Handler callbacks fire for -
CVE-2026-102822
russh: negotiating a MAC-requiring block cipher (CTR/CBC) wi -
CVE-2026-102821
Russh: Unbounded memory exhaustion via CHANNEL_OPEN flood du
V. Comments for CVE-2026-68930
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