{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90869","assignerOrgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","state":"PUBLISHED","assignerShortName":"ProgressSoftware","dateReserved":"2026-09-14T06:09:55.848Z","datePublished":"2026-10-29T15:54:48.769Z","dateUpdated":"2026-10-29T15:54:48.769Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","shortName":"ProgressSoftware","dateUpdated":"2026-10-29T15:54:48.769Z"},"title":"Pre-Authentication SSH Denial of Service via Malformed Public-Key Signature in Progress WS_FTP Server","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","type":"CWE"},{"lang":"en","cweId":"CWE-20","description":"CWE-20: Improper Input Validation","type":"CWE"}]}],"impacts":[{"descriptions":[{"lang":"en","value":"Overread Buffers - Improper handling of input data could result in denial of service."}]}],"affected":[{"vendor":"Progress Software","product":"WS_FTP Server","platforms":["Windows"],"versions":[{"status":"affected","version":"0","lessThan":"2024.0.7","versionType":"custom"},{"status":"affected","version":"0","lessThan":"2025.0.4","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"A remote attacker who knows a valid account's enrolled SSH public key can terminate the shared SSH service in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows.","supportingMedia":[{"type":"text/html","base64":false,"value":"A remote attacker who knows a valid account's enrolled SSH public key can terminate the shared SSH service in Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows."}]}],"references":[{"url":"https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}],"workarounds":[{"lang":"en","value":"Restrict network access to the SSH/SFTP service to trusted clients and disable SSH/SFTP access if it is not required. Contact Progress Software Technical Support for guidance on available mitigations.","supportingMedia":[{"type":"text/html","base64":false,"value":"<div>Restrict network access to the SSH/SFTP service to trusted clients and disable SSH/SFTP access if it is not required. Contact Progress Software Technical Support for guidance on available mitigations.</div>"}]}],"credits":[{"lang":"en","value":"Niv Levy (restricted)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}}}}