OpenBSD OpenSSH up to 10.5 Tunnel Forwarding authorized_keys improper authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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2.9$0-$5k0.60

Summaryinfo

A vulnerability was found in OpenBSD OpenSSH up to 10.5 and classified as problematic. Affected by this issue is some unknown functionality of the file authorized_keys of the component Tunnel Forwarding. Executing a manipulation can lead to improper authorization. This vulnerability is tracked as CVE-2026-106586. The attack is restricted to local execution. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in OpenBSD OpenSSH up to 10.5. This vulnerability affects an unknown code of the file authorized_keys of the component Tunnel Forwarding. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect integrity. CVE summarizes:

In sshd in OpenSSH before 10.6, the restrict keyword (in authorized_keys) was supposed to be applicable to tunnel forwarding but was not, a different vulnerability than CVE-2026-73283.

The advisory is shared for download at openssh.org. This vulnerability was named CVE-2026-106586 since 10/06/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/07/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 10.6 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-94016). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.9
VulDB Meta Temp Score: 2.9

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 2.5
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authorization
CWE: CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenSSH 10.6

Timelineinfo

10/06/2026 Advisory disclosed
10/06/2026 +0 days CVE reserved
10/06/2026 +0 days VulDB entry created
10/07/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: openbsd.org

Advisory: openssh.org
Status: Confirmed

CVE: CVE-2026-106586 (🔒)
GCVE (CVE): GCVE-0-2026-106586
GCVE (VulDB): GCVE-100-414712
EUVD: 🔒

Entryinfo

Created: 10/06/2026 23:19
Updated: 10/07/2026 00:59
Changes: 10/06/2026 23:19 (65), 10/07/2026 00:59 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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