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CVE-2026-73283

Quick assessment

Affected
OpenBSD OpenSSH
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.

OpenBSD OpenSSH是加拿大OpenBSD基金会开源的一款提供加密远程登录与安全连接的产品。 OpenBSD OpenSSH 10.5之前版本存在处理逻辑错误漏洞，该漏洞源于restrict关键字未正确应用于隧道转发，可能导致隧道转发绕过限制。

CVSS 2.5 · Low EPSS 0.09% · P0

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenBSD OpenSSH < 10.5 affected
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I. Basic Information for CVE-2026-73283

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In sshd in OpenSSH before 10.5, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
控制流实现总是不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenBSD OpenSSH 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenBSD OpenSSH是加拿大OpenBSD基金会开源的一款提供加密远程登录与安全连接的产品。 OpenBSD OpenSSH 10.5之前版本存在处理逻辑错误漏洞，该漏洞源于restrict关键字未正确应用于隧道转发，可能导致隧道转发绕过限制。
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

Vendor Product Affected Versions CPE Subscribe
OpenBSD OpenSSH 0 ~ 10.5 -

II. Public POCs for CVE-2026-73283

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III. Intelligence Information for CVE-2026-73283

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Other References for CVE-2026-73283 (1)

Same Patch Batch · OpenBSD · 2026-08-11 · 3 CVEs total

CVE-2026-73282 4.8 MEDIUM OpenBSD OpenSSH 资源管理错误漏洞
CVE-2026-73281 3.5 LOW OpenBSD OpenSSH 权限许可和访问控制问题漏洞

IV. Related Vulnerabilities

Same product: OpenSSH
Same vendor: OpenBSD
Same weakness: CWE-670

V. Comments for CVE-2026-73283

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