CVE-2026-44226: pyLoad: Unauthenticated traceback disclosure via global exception handler in WebUI

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-11 · updated 2026-06-17
Weakness: CWE-209

Description

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, pyload-ng WebUI returns full Python traceback details to clients on unhandled exceptions. Because /web/<path:filename> is reachable without authentication and renders attacker-controlled template names, an unauthenticated user can reliably trigger a server exception (for example by requesting a non-existent template) and receive internal stack traces in the HTTP response. This vulnerability is fixed in 0.5.0b3.dev100.

Affected products

pyload/pyload: before 2026-04-13 — fixed in 2026-04-13

How to fix

Upgrade to a fixed version: pyload/pyload 2026-04-13. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2026-44226 or the next vulnerability affects your stack