CVE-2026-40071 pyLoad WebUI JSON permission mismatch lets ADD/DELETE users invoke MODIFY-only actions
Authenticated low-privileged users can bypass permission checks to modify download packages and links via WebUI JSON endpoints.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40071?
CVE-2026-40071 is a medium-severity missing authorization vulnerability in pyload, published on 9 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-40071?
3 open source packages ship an affected version, including pyload-ng. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pyload-ng PyPI | All versions to 0.5.0b3 | None |
pyload-ng PyPI | All versions | 0.5.0b3.dev97 |
pyload-ng PyPI | All versions | 0.5.0b3.dev97 |
Products include Pyload Pyload.
How do I fix CVE-2026-40071?
Upgrade pyload-ng to 0.5.0b3.dev97 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-40071 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40071 exists.
Other vulnerabilities in pyload
- CVE-2023-0297 Code Injection in pyload/pyload
- CVE-2026-33992 pyLoad: Server-Side Request Forgery via Download Link Submission Enables Cloud Metadata Exfiltration
- CVE-2024-47821 pyLoad vulnerable to remote code execution by download to /.pyload/scripts using /flashgot API
- CVE-2024-32880 pyLoad allows upload to arbitrary folder lead to RCE
- CVE-2026-41133 pyLoad has Stale Session Privilege After Role/Permission Change (Privilege Revocation Bypass)
Sources
Also known as GHSA-rfgh-63mg-8pwm, PYSEC-2026-2997.