IPv4 Address Vulnerability in pyLoad Download Manager by pyLoad
CVE-2026-48737

4.9MEDIUM

Key Information:

Vendor

Pyload

Status
Pyload
Vendor
CVE Published:
15 September 2026

What is CVE-2026-48737?

A flaw in the pyLoad download manager allows low-privileged users to exploit the 'is_global_address' function, which incorrectly handles IPv4 destinations within IPv6 addresses. This oversight can lead to unauthorized access and visibility into internal network structures, as well as potential service disruptions. The vulnerability arises when certain IPv6 addresses are incorrectly validated, enabling attackers to conduct reconnaissance or reveal cloud metadata. This issue was corrected in the release of version 0.5.0b3.dev101.

Affected Version(s)

pyload < 0.5.0b3.dev101

References

https://github.com/pyload/pyload/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/pyload/pyload/commit/ba7491046b2d43073...
x_refsource_MISC

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.