{"id":"CVE-2026-33511","summary":"pyload-ng: Authentication Bypass via Host Header Injection in ClickNLoad","details":"pyLoad is a free and open-source download manager written in Python. From version 0.4.20 to before version 0.5.0b3.dev97, the local_check decorator in pyLoad's ClickNLoad feature can be bypassed by any remote attacker through HTTP Host header spoofing. This allows unauthenticated remote users to access localhost-restricted endpoints, enabling them to inject arbitrary downloads, write files to the storage directory, and execute JavaScript code. This issue has been patched in version 0.5.0b3.dev97.","aliases":["GHSA-g5j2-gxqh-x7pw"],"modified":"2026-07-15T01:48:51.894471289Z","published":"2026-03-24T18:56:08.886Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33511.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0.4.20"},{"fixed":"0.5.0b3.dev97"}]},{"extracted_events":[{"fixed":"0.5.0b3.dev97"}],"source":"DESCRIPTION"}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-639"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33511.json"},{"type":"ADVISORY","url":"https://github.com/pyload/pyload/security/advisories/GHSA-g5j2-gxqh-x7pw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33511"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pyload/pyload","events":[{"introduced":"0"},{"last_affected":"1f29cd14d4c3d90d3249d20165a21c2b04ffed26"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:pyload:pyload:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"0.4.20"}]}}],"versions":["v0.4.20","v0.4.9","v0.4.8","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4","v0.3.2","v0.3.1","v0.3","v0.2.2","v0.2.1","v0.2","v0.1.1","v0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33511.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:L/SA:N"}]}