{"id":"CVE-2026-35464","state":"PUBLISHED","title":"pyLoad has an incomplete fix for CVE-2026-33509: unprotected storage_folder enables arbitrary file write to Flask session store and code execution","description":"pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1.","publishedAt":"2026-04-07T14:38:02.480Z","updatedAt":"2026-04-07T15:58:59.013Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["pyload pyload"],"affected":[{"vendor":"pyload","product":"pyload","versions":[{"version":"<= 0.5.0b3.dev96","status":"affected"}]}],"references":["https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j","https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxx","https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1","https://www.cve.org/CVERecord?id=CVE-2026-33509"],"weaknesses":["CWE-502","CWE-863"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/35xxx/CVE-2026-35464.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-35464","state":"PUBLISHED","datePublished":"2026-04-07T14:38:02.480Z","dateUpdated":"2026-04-07T15:58:59.013Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-02T19:25:52.193Z"},"containers":{"cna":{"title":"pyLoad has an incomplete fix for CVE-2026-33509: unprotected storage_folder enables arbitrary file write to Flask session store and code execution","descriptions":[{"lang":"en","value":"pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1."}],"affected":[{"vendor":"pyload","product":"pyload","versions":[{"version":"<= 0.5.0b3.dev96","status":"affected"}]}],"references":[{"url":"https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j","name":"https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxx","name":"https://github.com/pyload/pyload/security/advisories/GHSA-r7mc-x6x7-cqxx","tags":["x_refsource_MISC"]},{"url":"https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1","name":"https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1","tags":["x_refsource_MISC"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33509","name":"https://www.cve.org/CVERecord?id=CVE-2026-33509","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","lang":"en","description":"CWE-502: Deserialization of Untrusted Data","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-07T14:38:02.480Z"},"source":{"advisory":"GHSA-4744-96p5-mp2j","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/pyload/pyload/security/advisories/GHSA-4744-96p5-mp2j","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-07T15:12:26.147429Z","id":"CVE-2026-35464","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-07T15:58:59.013Z"}}]}}}