{"id":"CVE-2026-90870","state":"PUBLISHED","title":"Unauthenticated Ad Hoc Transfer Resource Exhaustion in Progress WS_FTP Server","description":"A missing release of backend receiver sessions in the Ad Hoc Transfer component of Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could lead to server resource exhaustion and service degradation.","publishedAt":"2026-10-29T15:55:43.950Z","updatedAt":"2026-10-30T17:15:05.940Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"ProgressSoftware"},"assigner":"ProgressSoftware","products":["Progress Software WS_FTP Server"],"affected":[{"vendor":"Progress Software","product":"WS_FTP Server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2024.0.7","versionType":"custom"},{"version":"0","status":"affected","lessThan":"2025.0.4","versionType":"custom"}],"platforms":["Windows"]}],"references":["https://progress.lightning.force.com/lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view"],"weaknesses":["CWE-400","CWE-772"],"ingestedAt":"2026-10-30T17:26:04.566Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90870.json","commit":"e8328137ecf4069b095dab9de0403e0e5a96b5ec","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90870","state":"PUBLISHED","datePublished":"2026-10-29T15:55:43.950Z","dateUpdated":"2026-10-30T17:15:05.940Z","assignerShortName":"ProgressSoftware","assignerOrgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","dateReserved":"2026-09-14T06:09:55.848Z"},"containers":{"cna":{"title":"Unauthenticated Ad Hoc Transfer Resource Exhaustion in Progress WS_FTP Server","descriptions":[{"lang":"en","value":"A missing release of backend receiver sessions in the Ad Hoc Transfer component of Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could lead to server resource exhaustion and service degradation."}],"affected":[{"vendor":"Progress Software","product":"WS_FTP Server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2024.0.7","versionType":"custom"},{"version":"0","status":"affected","lessThan":"2025.0.4","versionType":"custom"}],"platforms":["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":"LOW","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"},{"cweId":"CWE-772","lang":"en","description":"CWE-772: Missing Release of Resource after Effective Lifetime","type":"CWE"}]}],"providerMetadata":{"shortName":"ProgressSoftware","orgId":"f9fea0b6-671e-4eea-8fde-31911902ae05","dateUpdated":"2026-10-29T15:55:43.950Z"},"impacts":[{"descriptions":[{"lang":"en","value":"Excessive Allocation - repeated unauthenticated requests retain backend sessions and cause resource exhaustion and service degradation"}]}],"workarounds":[{"lang":"en","value":"Shorten the XFT session timeout where practical, and restrict the Ad Hoc Transfer endpoint to trusted networks if external access is not required. Contact Progress Software Technical Support for guidance on available mitigations.","supportingMedia":[{"type":"text/html","base64":false,"value":"<div>Shorten the XFT session timeout where practical, and restrict the Ad Hoc Transfer endpoint to trusted networks if external access 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"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T17:14:52.709323Z","id":"CVE-2026-90870","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-30T17:15:05.940Z"}}]}}}