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CVE-2026-35459— pyLoad has SSRF fix bypass via HTTP redirect

Quick assessment

Affected
pyload pyload
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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.dev96及之前版本存在代码问题漏洞，该漏洞源于重定向目标未经验证，可能导致服务端请求伪造。

AI Predicted 8.8 Difficulty: Easy EPSS 0.38% · P30
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I. Basic Information for CVE-2026-35459

Vulnerability Information
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Vulnerability Title
pyLoad has SSRF fix bypass via HTTP redirect
Source: CVE Program / CVE List V5
Vulnerability Description
pyLoad is a free and open-source download manager written in Python. In 0.5.0b3.dev96 and earlier, pyLoad has a server-side request forgery (SSRF) vulnerability. The fix for CVE-2026-33992 added IP validation to BaseDownloader.download() that checks the hostname of the initial download URL. However, pycurl is configured with FOLLOWLOCATION=1 and MAXREDIRS=10, causing it to automatically follow HTTP redirects. Redirect targets are never validated against the SSRF filter. An authenticated user with ADD permission can bypass the SSRF fix by submitting a URL that redirects to an internal address.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
pyLoad 代码问题漏洞
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.dev96及之前版本存在代码问题漏洞，该漏洞源于重定向目标未经验证，可能导致服务端请求伪造。
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.dev96 -

II. Public POCs for CVE-2026-35459

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III. Intelligence Information for CVE-2026-35459

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Patches & Fixes for CVE-2026-35459 (1)

Vendor Advisories for CVE-2026-35459 (1)

IV. Related Vulnerabilities

Same product: pyload
Same vendor: pyload
Same weakness: CWE-918

V. Comments for CVE-2026-35459

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