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CVE-2026-59995 is an improper path-constraining vulnerability in the OpenSSH sftp client before 10.4. When a client downloads from an attacker-controlled SFTP server using the form sftp server:/path ., the client does not properly constrain the destination location of server-supplied downloaded files. A malicious server can cause files to be placed outside the intended local download directory.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
35 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability covered by an Oracle Linux 9 security update affecting Oracle Linux OpenSSH-related packages.
A specific vulnerability referenced by a Miracle Linux 8 OpenSSH security advisory/plugin; the content does not provide technical details for this CVE.
A vulnerability addressed by Ubuntu USN-8804-1 affecting listed OpenSSH packages.
An OpenSSH SFTP-client vulnerability that allows an attacker to control the location of a downloaded file.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.