CVE-2026-106585: CWE-409 Improper Handling of Highly Compressed Data (Data Amplification) in OpenBSD OpenSSH
Description
CVE-2026-106585 is a vulnerability in OpenSSH versions before 10.6 where the sshd and ssh components do not verify if the maximum packet length is exceeded during decompression of highly compressed data. This improper handling can lead to data amplification issues. The vulnerability has a medium severity with a CVSS score of 6.5.
CVSS v3.1
Score 6.5medium
Affected software
OpenBSD
OpenSSH
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-106585) affects OpenSSH versions prior to 10.6. It involves improper handling of highly compressed data during decompression in sshd and ssh, where no check is performed to ensure the maximum packet length is not exceeded. This flaw is categorized under CWE-409 (Improper Handling of Highly Compressed Data), which can result in data amplification. The CVSS 3.1 base score is 6.5, indicating a medium severity level. No patch or vendor advisory information is provided in the input data.
Potential Impact
The vulnerability can lead to data amplification, potentially causing denial of service or resource exhaustion due to processing excessively large decompressed packets. There is no indication of confidentiality impact, but integrity and availability impacts are possible. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor OpenBSD and OpenSSH advisories for updates addressing this issue. Until a patch is available, consider limiting exposure of affected OpenSSH services to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-10-06T20:52:39.482Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac562452cdf04f656de8cf7
Added to database: 10/06/2026, 21:04:05 UTC
Last enriched: 10/06/2026, 21:18:37 UTC
Last updated: 10/06/2026, 21:18:55 UTC
Views: 4
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