CVE-2026-41133 json
pyLoad has Stale Session Privilege After Role/Permission Change (Privilege Revocation Bypass)
published 2026-04-14 6 mo ago modified 2026-07-13 3 mo ago also EUVD-2026-24574 , GHSA-66hx-chf7-3332 , PYSEC-2026-2990
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 25%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/pyload/pyload/security/advisories/GHSA-66hx-chf7-3332 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pyload-ng | <=0.5.0b3.dev97 |
no fix listed |
Affected products
- pyload pyload
Classification
- Weakness
-
- CWE-613 DEPRECATED: Insufficient Session Expiration
References
-
github.com
/pyload/pyload/commit/e95804fb0d06cbb07d2ba380fc494d9ff89b68c1
web, patch
-
github.com
/pyload/pyload/security/advisories/GHSA-66hx-chf7-3332
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-41133
advisory
-
github.com
/pyload/pyload
package
-
pypi.org
/project/pyload-ng
package
-
github.com
/advisories/GHSA-66hx-chf7-3332
advisory
Sources
- CVE List CVE-2026-41133
- GitHub Advisory GHSA-66hx-chf7-3332
- NVD CVE-2026-41133
- OSV PYSEC-2026-2990
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.