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CVE-2026-45348— pyLoad: Stored XSS in Downloads view via unsanitized link URL in packages.js template literal

Quick assessment

Affected
pyload pyload
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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packages.js模板将存储的链接URL插值到单引号HTML内的模板字面量中并写入DOM，未进行转义，攻击者可提交包含单引号和事件处理器的包链接，在每个操作员的浏览器中执行JavaScript。

CVSS 8.7 · High EPSS 0.35% · P26

Affected Version Matrix 1

VendorProduct Version RangeStatus
pyload pyload < 0.5.0b3.dev100 affected
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I. Basic Information for CVE-2026-45348

Vulnerability Information
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Vulnerability Title
pyLoad: Stored XSS in Downloads view via unsanitized link URL in packages.js template literal
Source: CVE Program / CVE List V5
Vulnerability Description
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the packages.js template at src/pyload/webui/app/themes/modern/templates/js/packages.js:172 interpolates a stored link URL into a template literal inside single-quoted HTML and then writes the result to the DOM via $(div).html(html). No escaping runs between the API value and innerHTML. An attacker (Alice) who can submit a package link puts a single quote plus event handler into the URL, breaks out of the attribute, and executes JavaScript in every operator's browser that opens the downloads view. The theme does not set a Content Security Policy that restricts inline script or event handlers. This vulnerability is fixed in 0.5.0b3.dev100.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
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packages.js模板将存储的链接URL插值到单引号HTML内的模板字面量中并写入DOM，未进行转义，攻击者可提交包含单引号和事件处理器的包链接，在每个操作员的浏览器中执行JavaScript。
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

Vendor Product Affected Versions CPE Subscribe
pyload pyload < 0.5.0b3.dev100 -

II. Public POCs for CVE-2026-45348

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8961 chars
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III. Intelligence Information for CVE-2026-45348

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Vendor Advisories for CVE-2026-45348 (1)

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

CVE-2026-45306 6.5 MEDIUM pyLoad: Incomplete Fix for CVE-2026-33509 -storage_folder Bypass via Session Directory
CVE-2026-46561 5.0 MEDIUM pyLoad: SSRF via HTTP Redirect Bypass in parse_urls API

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-79

V. Comments for CVE-2026-45348

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