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CVE-2026-45306— pyLoad: Incomplete Fix for CVE-2026-33509 -storage_folder Bypass via Session Directory

CVSS 6.5 · Medium EPSS 0.03% · P9

Possible ATT&CK Techniques 1AI

T1528 · Steal Application Access Token

Affected Version Matrix 1

VendorProductVersion RangeStatus
pyloadpyload< 0.5.0b3.dev100affected
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I. Basic Information for CVE-2026-45306

Vulnerability Information
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Vulnerability Title
pyLoad: Incomplete Fix for CVE-2026-33509 -storage_folder Bypass via Session Directory
Source: NVD (National Vulnerability Database)
Vulnerability Description
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the fix for CVE-2026-33509 prevents setting storage_folder inside PKGDIR or userdir, but does NOT protect the Flask session directory (/tmp/pyLoad/flask). An authenticated attacker can set storage_folder to the session directory and download session files of other users via /files/get/, leading to account takeover. This vulnerability is fixed in 0.5.0b3.dev100.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用不正确的解析名称或索引
Source: NVD (National Vulnerability Database)
Vulnerability Title
pyLoad 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pyLoad是pyLoad开源的一个用 Python 编写的免费开源下载管理器。 pyLoad 0.5.0b3.dev100之前版本存在安全漏洞，该漏洞源于修复CVE-2026-33509时未保护Flask会话目录，经过身份验证的攻击者可设置storage_folder为会话目录并通过/files/get/下载其他用户的会话文件，导致账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
pyloadpyload < 0.5.0b3.dev100 -

II. Public POCs for CVE-2026-45306

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III. Intelligence Information for CVE-2026-45306

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Vendor Advisories for CVE-2026-45306 (1)

Same Patch Batch · pyload · 2026-05-28 · 3 CVEs total

CVE-2026-453488.7 HIGHpyLoad: Stored XSS in Downloads view via unsanitized link URL in packages.js template lite
CVE-2026-465615.0 MEDIUMpyLoad: SSRF via HTTP Redirect Bypass in parse_urls API

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-706

V. Comments for CVE-2026-45306

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