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CVE-2025-26465 is an OpenSSH client host-key-verification vulnerability affecting configurations with VerifyHostKeyDNS enabled, including values of "yes" or "ask". OpenSSH mishandles error codes under specific host-key-verification conditions, allowing an on-path attacker to impersonate a legitimate SSH server. The issue affects OpenSSH client versions 6.8p1 through 9.9p1 when the option is enabled.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
28 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenSSH host-key-verification flaw affecting configurations with VerifyHostKeyDNS enabled. Under specific error conditions, an attacker able to exhaust client memory could impersonate a legitimate SSH server in a machine-in-the-middle attack.
A network-reachable vulnerability requiring user interaction, with high confidentiality and integrity impact according to the supplied CVSS v3 vector (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N).
An OpenSSH host-key verification flaw affecting configurations with VerifyHostKeyDNS enabled. Under specific error-handling conditions, a machine-in-the-middle attacker could impersonate a legitimate SSH server after exhausting the client's memory resources, making exploitation high complexity.
A moderate-severity vulnerability tracked as CVE-2025-26465, addressed through a CentOS 8 TuxCare security update.
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.