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CVE-2026-59844 is an uncontrolled memory-allocation vulnerability in the libssh SFTP server. The server did not correctly impose limits on the length supplied in SSH_FXP_READ requests. An authenticated remote SFTP client can submit a read request specifying an arbitrarily large length, causing excessive memory allocation. Repeated requests can exhaust available memory.
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What an attacker gets, and what they’ve been doing with it.
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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.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in the libssh packages for Oracle Linux 9 addressed by the referenced Oracle Linux security update; no technical vulnerability details are provided.
A vulnerability addressed by the Miracle Linux AXSA-2026-1751 advisory for libssh packages.
A vulnerability addressed by the Oracle Linux ELSA-2026-622180 update for libssh packages on Oracle Linux 8.
A vulnerability addressed by the Miracle Linux AXSA-2026-1742 libssh security update; the supplied content provides no technical flaw details.
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.