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CVE-2026-59846 is an OS command-injection vulnerability in libssh ProxyCommand handling. libssh did not correctly sanitize shell metacharacters when substituting the remote username through the %r token in a ProxyCommand string. A malicious username can therefore alter shell parsing of the resulting command, causing unintended shell behavior and possible disclosure of process environment data.
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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.