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CVE-2026-45695 is a critical unauthenticated remote code execution vulnerability in Kopia affecting versions prior to 0.23.0. When the Kopia HTTP server is started with the --without-password option, the /api/v1/repo/exists endpoint accepts unauthenticated requests and forwards attacker-controlled SFTP repository configuration into storage initialization. In the vulnerable code path, attacker-supplied settings can enable use of an external SSH client and pass arbitrary SSH options through sshArguments to the spawned ssh process. By supplying an OpenSSH ProxyCommand option, an attacker can cause command execution through the local shell before any SSH connection is established. The flaw results from exposing a critical function without authentication and from unsafe propagation of untrusted input into OS command arguments used by OpenSSH.
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No public exploit code observed for this vulnerability.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unauthenticated remote code execution vulnerability in Kopia caused by SSH ProxyCommand injection when the HTTP server is started with --without-password; affects versions prior to 0.23.0.
A remote code execution vulnerability in the Kopia server related to SSH ProxyCommand injection via SSH arguments, apparently reachable through the /api/v1/repo/exists functionality when using external SSH options.
An unauthenticated command execution vulnerability in Kopia server <= 0.22.3 involving SFTP externalSSH argument injection via sshArguments and ssh ProxyCommand handling.
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.