CVE-2026-59995: sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when "sftp server:/path ." is used with an attacker-controlled server.

CSIRTS triage

What: The sftp command in OpenSSH does not properly constrain file download locations when used with an attacker-controlled server.
Who is affected: Deployments of OpenSSH before version 10.4 using sftp.
Urgency: Remediation is medium urgency as it could lead to unauthorized file access, but no exploitation has been reported.
Action: Upgrade to OpenSSH version 10.4 or later.

AI-assisted analysis generated from the source advisory — verify against the original.

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EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-599950.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.

CVE	CSIRTS overview	External
CVE-2026-59995	coverage & exploitation status	NVD · CVE.org

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