CVE-2026-41133 pyLoad has Stale Session Privilege After Role/Permission Change (Privilege Revocation Bypass)
Logged-in users retain revoked privileges until session expiry due to cached role data, allowing unauthorized privileged actions in pyLoad.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41133?
CVE-2026-41133 is a high-severity missing authorization vulnerability in pyload, published on 21 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. Versions up to and including 0.5.0b3.dev97 cache `role` and `permission` in the session at login and continues to authorize requests using these cached values, even after an admin changes the user's role/permissions in the database. As a result, an already logged-in user can keep old (revoked) privileges until logout/session expiry, enabling continued privileged actions. This is a core authorization/session-consistency issue and is not resolved by toggling an optional security feature. Commit e95804fb0d06cbb07d2ba380fc494d9ff89b68c1 contains a fix for the issue.
Weakness: CWE-613
Which versions are affected by CVE-2026-41133?
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.dev97 | None |
pyload-ng PyPI | All versions to 0.5.0b3.dev97 | None |
pyload-ng PyPI | All versions to 0.5.0b3.dev97 | None |
Products include Pyload Pyload.
How do I fix CVE-2026-41133?
No fix has been published for CVE-2026-41133 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-41133 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41133 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-2023-47890 Download to arbitrary folder can lead to RCE
Sources
Also known as GHSA-66hx-chf7-3332, PYSEC-2026-2990.