CVE-2026-35459

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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/pyload/pyload/commit/33c55da084320430edfd941b60e3da0eb1be9443	Patch
https://github.com/pyload/pyload/security/advisories/GHSA-7gvf-3w72-p2pg	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:*

History

No history.

Information

Published : 2026-04-06 20:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-35459

Mitre link : CVE-2026-35459

CVE.ORG link : CVE-2026-35459

JSON object : View

Products Affected

pyload-ng_project

pyload-ng

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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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."}, {"lang": "es", "value": "pyLoad es un gestor de descargas gratuito y de c\u00f3digo abierto escrito en Python. En 0.5.0b3.dev96 y versiones anteriores, pyLoad tiene una vulnerabilidad de falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF). La soluci\u00f3n para CVE-2026-33992 a\u00f1adi\u00f3 validaci\u00f3n de IP a BaseDownloader.download() que comprueba el nombre de host de la URL de descarga inicial. Sin embargo, pycurl est\u00e1 configurado con FOLLOWLOCATION=1 y MAXREDIRS=10, lo que hace que siga autom\u00e1ticamente las redirecciones HTTP. Los destinos de redirecci\u00f3n nunca se validan contra el filtro SSRF. Un usuario autenticado con permiso ADD puede eludir la soluci\u00f3n SSRF enviando una URL que redirige a una direcci\u00f3n interna."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "49DB5560-08BC-47E1-ADC3-729D9746159F", "versionEndExcluding": "0.5.0b3.dev97"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}