{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8328","assignerOrgId":"28c92f92-d60d-412d-b760-e73465c3df22","state":"PUBLISHED","assignerShortName":"PSF","dateReserved":"2026-05-11T15:06:00.859Z","datePublished":"2026-05-13T20:14:33.751Z","dateUpdated":"2026-05-14T12:49:39.908Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","modules":["ftplib"],"product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"lessThan":"3.15.0","status":"affected","version":"0","versionType":"python"}]}],"credits":[{"lang":"en","type":"reporter","value":"Qi Deng (https://github.com/ikow)"},{"lang":"en","type":"remediation developer","value":"Bénédikt Tran (https://github.com/picnixz)"},{"lang":"en","type":"remediation developer","value":"Gregory P. Smith (https://github.com/gpshead)"}],"descriptions":[{"lang":"en","supportingMedia":[{"type":"text/html","value":"<div>The ftpcp() function in Lib/ftplib.py was not updated when \nCVE-2021-4189 was fixed. While makepasv() was patched to replace \nserver-supplied PASV host addresses with the actual peer address \n(getpeername()[0]), ftpcp() still calls parse227() directly and passes \nthe raw attacker-controllable IP address and port to target.sendport(). This patch is related to&nbsp;CVE-2021-4189.</div>"}],"value":"The ftpcp() function in Lib/ftplib.py was not updated when \nCVE-2021-4189 was fixed. While makepasv() was patched to replace \nserver-supplied PASV host addresses with the actual peer address \n(getpeername()[0]), ftpcp() still calls parse227() directly and passes \nthe raw attacker-controllable IP address and port to target.sendport(). This patch is related to CVE-2021-4189."}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":5.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","description":"CWE-918 Server-Side request forgery (SSRF)","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"28c92f92-d60d-412d-b760-e73465c3df22","shortName":"PSF","dateUpdated":"2026-05-13T20:21:23.294Z"},"references":[{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/87451"},{"tags":["patch"],"url":"https://github.com/python/cpython/pull/149648"},{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/ITF2BAPBQEPYK3LDMPRSY435JGNHYNDP/"}],"source":{"discovery":"UNKNOWN"},"title":"FTP PASV SSRF, ftpcp() does not use actual peer address, trusts server-supplied PASV host address"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-14T12:49:18.311219Z","id":"CVE-2026-8328","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-14T12:49:39.908Z"}}]}}