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CVE-2026-35386 is a low-severity vulnerability in OpenSSH versions before 10.3 where command execution can occur due to improper handling of shell metacharacters in usernames on the command line. Exploitation requires an untrusted username input and non-default ssh_config settings involving the % character. The vulnerability has a CVSS score of 3.6 and does not have known exploits in the wild. No official patch or remediation details are provided in the available data.

This vulnerability (CVE-2026-35386) in OpenSSH prior to version 10.3 involves incorrect behavior order (CWE-696) that allows command execution through shell metacharacters embedded in a username passed on the command line. Successful exploitation depends on the presence of untrusted usernames and specific non-default configurations of the % character in ssh_config. The CVSS 3.1 base score is 3.6, reflecting low impact with local attack vector, high attack complexity, low privileges required, no user interaction, and limited confidentiality and integrity impact.

Detailed information about CVE-2026-35386: CWE-696 Incorrect Behavior Order in OpenBSD OpenSSH affecting OpenBSD OpenSSH. Get real-time updates, technical detai

CVE-2026-35386: CWE-696 Incorrect Behavior Order in OpenBSD OpenSSH - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-35386: CWE-696 Incorrect Behavior Order in OpenBSD OpenSSH

ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is 8.9.

CVE-2023-28531 is a security vulnerability identified in the ssh-add utility of OpenSSH versions from 8.9 up to but not including 9.3. The vulnerability arises because ssh-add adds smartcard keys to the ssh-agent without applying the intended per-hop destination constraints. Normally, these constraints limit the use of smartcard keys to specific SSH hops or destinations, preventing keys from being forwarded or used beyond their intended scope. Due to this flaw, smartcard keys can be forwarded or used across multiple SSH hops without restriction, increasing the risk of key misuse if an attacker gains access to an intermediate system. This undermines the security model of smartcard-based authentication, which relies on strict control over key usage. The vulnerability does not require user interaction once the key is added, and no authentication bypass is involved, but the lack of constraints can lead to unauthorized key usage. No public exploits or active attacks have been reported to date. The vulnerability affects a wide range of systems using OpenSSH versions 8.9 through 9.2, which are common in many Linux distributions and Unix-like environments. The issue was publicly disclosed on March 17, 2023, but no CVSS score has been assigned yet. The recommended fix is to upgrade to OpenSSH version 9.3 or later, where the per-hop destination constraints are properly enforced when adding smartcard keys to ssh-agent.

Detailed information about CVE-2023-28531: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2023-28531: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-28531: n/a


CVE-2026-35386: CWE-696 Incorrect Behavior Order in OpenBSD OpenSSHCVE-2026-35386 0 CVE-2026-35386 is a low-severity vulnerability in OpenSSH versions before 10.3 where command execution can occur due to improper handling of shell metacharacters in usernames on the command line. Exploitation requires an untrusted username input and non-default ssh_config settings involving the % character. The vulnerability has a CVSS score of 3.6 and does not have known exploits in the wild. No official patch or remediation details are provided in the available data. LowVulnerability#cve #cve-2026-35386 #cwe-696 Join the discussion	CVE Database V5	04/02/2026, 16:44:27 UTC Added: 04/02/2026, 17:08:18 UTC
CVE-2023-28531: n/aCVE-2023-28531 0 ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is 8.9. UnknownVulnerabilityGermanyFranceUnited Kingdom+5#cve #cve-2023-28531 Join the discussion	CVE Database V5	03/17/2023, 00:00:00 UTC Added: 11/04/2025, 18:19:07 UTC

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