CVE Tools
Sign in

CVE-2026-35459

pyLoad has SSRF fix bypass via HTTP redirect

Published: Apr 6, 2026Updated: Apr 20, 2026 Sources: CVE List NVDCWE-918
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
0.3%
Top 80.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-918

Affected Products

pyload-ngpyload-ng project
On-prem
Consumer Software / file-utility
pyloadpyload
On-prem
Consumer Software / file-utility
pyload-ng projectoss-projectConsumer Softwareaka pyload-ng
pyloadoss-projectConsumer Softwareaka pyload/pyload

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/pyload/pyload/commit/33c55da084320430edfd941b60e3da0eb1be9443
github.com
https://github.com/pyload/pyload/security/advisories/GHSA-7gvf-3w72-p2pg
github.com

Timeline

Published
Apr 6, 2026
Last Updated
Apr 20, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-35459 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows