TI-2026-27594 Aliases CVE-2026-35464 GHSA-4744-96p5-mp2j

Deserialization of untrusted data in pyload

HIGH 68CWE-502Published 2026-04-07 · Updated 2026-04-07

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: Code execution, Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502 and CWE-863.

Summary

pyLoad is a free and open-source download manager written in Python. The fix for CVE-2026-33509 added an ADMIN_ONLY_OPTIONS set to block non-admin users from modifying security-critical config options. The storage_folder option is not in this set and passes the existing path restriction because the Flask session directory is outside both PKGDIR and userdir. A user with SETTINGS and ADD permissions can redirect downloads to the Flask filesystem session store, plant a malicious pickle payload as a predictable session file, and trigger arbitrary code execution when any HTTP request arrives with the corresponding session cookie. This vulnerability is fixed with commit c4cf995a2803bdbe388addfc2b0f323277efc0e1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00548 46th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged 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: No
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	—	No fix listed	GHSA-4744-96p5-mp2j

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 Fixed in — No fix listed GHSA-4744-96p5-mp2j

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:pyload:pyload::::::::	before 2026-04-02	Vulnerable	pyload

cpe:2.3:a:pyload:pyload:*:*:*:*:*:*:*:* Versions before 2026-04-02 Vulnerable ·pyload

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-35464
2026-10-03 Alias added: GHSA-4744-96p5-mp2j

References

Exploit 2

Patch 1

https://github.com/pyload/pyload/commit/c4cf995a2803bdbe388addfc2b0f323277efc0e1

Advisory 3

Other 1

https://github.com/pyload/pyload

TI-2023-00282 Code Injection in pyload/pyload 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
TI-2024-32088 pyLoad vulnerable to remote code execution by download to /.pyload/scripts using /flashgot API CVSS 3.1CRITICAL 9.1
TI-2026-29761 pyLoad has Stale Session Privilege After Role/Permission Change (Privilege Revocation Bypass) CVSS 3.1HIGH 8.8

See all 22 →

Sources

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