TI-2026-34239 Aliases CVE-2026-46561 GHSA-8rp3-xc6w-5qp5

pyLoad: SSRF via HTTP Redirect Bypass in parse_urls API

MEDIUM 56CWE-918Published 2026-05-28 · Updated 2026-05-28

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the PREREQFUNCTION-based private IP check was not applied to HTTPRequest (used by the parse_urls API). An authenticated attacker can supply a URL pointing to an attacker-controlled server that responds with a 302 redirect to an internal/private IP address, bypassing the is_global_host() check on the initial URL. This vulnerability is fixed in 0.5.0b3.dev100.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00176 7th percentileScored 2026-11-07

Fix Fixed pyload (pyload): 0.5.0b3.dev100pyload-ng (PyPI): 0.5.0b3.dev100

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
pyload	pyload	before 0.5.0b3.dev100	0.5.0b3.dev100	Patch available	CNA
—	pyload-ng (PyPI)	before 0.5.0b3.dev100	0.5.0b3.dev100	Patch available	GHSA-8rp3-xc6w-5qp5

pyload Vendorpyload Affected before 0.5.0b3.dev100 Fixed in 0.5.0b3.dev100 Patch available CNA
pyload-ng (PyPI) Vendor— Affected before 0.5.0b3.dev100 Fixed in 0.5.0b3.dev100 Patch available GHSA-8rp3-xc6w-5qp5

Remediation

Fix · CNA pyload (pyload) Fixed in 0.5.0b3.dev100
Fix · GHSA-8rp3-xc6w-5qp5 pyload-ng (PyPI) Fixed in 0.5.0b3.dev100 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-46561
2026-10-03 Alias added: GHSA-8rp3-xc6w-5qp5

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-46561

Other 2

TI-2023-00282 Code Injection in pyload/pyload CVSS 3.1CRITICAL 9.8
TI-2025-34556 pyLoad CNL Blueprint is vulnerable to Path Traversal through `dlc_path` leading to Remote Code Execution (RCE) CVSS 3.1CRITICAL 9.8
TI-2025-33765 pyLoad vulnerable to remote code execution through js2py onCaptchaResult CVSS 3.1CRITICAL 9.8
TI-2023-00412 Excessive Attack Surface in pyload/pyload CVSS 3.1CRITICAL 9.8
TI-2026-27589 pyLoad has SSRF fix bypass via HTTP redirect CVSS 4.0CRITICAL 9.3
TI-2026-26332 pyLoad: Server-Side Request Forgery via Download Link Submission Enables Cloud Metadata Exfiltration CVSS 4.0CRITICAL 9.3

See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences