TI-2026-27589 Aliases CVE-2026-35459 GHSA-7gvf-3w72-p2pg

pyLoad has SSRF fix bypass via HTTP redirect

HIGH 81CWE-918Published 2026-04-06 · Updated 2026-04-07

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: High · High · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00284 21st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

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	up to 0.5.0b3.dev96	—	No fix listed	CNA
—	pyload-ng (PyPI)	up to 0.5.0b3.dev96	—	No fix listed	GHSA-7gvf-3w72-p2pg

pyload Vendorpyload Affected up to 0.5.0b3.dev96 Fixed in — No fix listed CNA
pyload-ng (PyPI) Vendor— Affected up to 0.5.0b3.dev96 Fixed in — No fix listed GHSA-7gvf-3w72-p2pg

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:pyload-ng_project:pyload-ng::::::python::*	before 0.5.0b3.dev97	Vulnerable	Pyload-ng Project

cpe:2.3:a:pyload-ng_project:pyload-ng:*:*:*:*:*:python:*:* Versions before 0.5.0b3.dev97 Vulnerable ·Pyload-ng Project

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-35459
2026-10-03 Alias added: GHSA-7gvf-3w72-p2pg

References

Exploit 1

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

Patch 1

https://github.com/pyload/pyload/commit/33c55da084320430edfd941b60e3da0eb1be9443

Advisory 2

Other 1

https://github.com/pyload/pyload

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-2026-26332 pyLoad: Server-Side Request Forgery via Download Link Submission Enables Cloud Metadata Exfiltration CVSS 4.0CRITICAL 9.3
TI-2026-25907 pyload-ng: Authentication Bypass via Host Header Injection in ClickNLoad CVSS 4.0HIGH 8.8

See all 49 →

Sources

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