CVE-2026-40071: pyLoad WebUI JSON permission mismatch lets ADD/DELETE users invoke MODIFY-only actions

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-04-09 · updated 2026-06-17
Weakness: CWE-863

Description

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev97, the /json/package_order, /json/link_order, and /json/abort_link WebUI JSON endpoints enforce weaker permissions than the core API methods they invoke. This allows authenticated low-privileged users to execute MODIFY operations that should be denied by pyLoad's own permission model. This vulnerability is fixed in 0.5.0b3.dev97.

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

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