CVE-2026-40071 json
pyLoad WebUI JSON permission mismatch lets ADD/DELETE users invoke MODIFY-only actions
published 2026-04-08 7 mo ago modified 2026-10-26 13 d ago also EUVD-2026-20998 , GHSA-rfgh-63mg-8pwm , PYSEC-2026-2997
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- pypi pyload-ng 0.5.0b3.dev97
- pyload-ng_project pyload-ng 0.5.0b3.dev97
- pyload pyload 0.5.0b3.dev97
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/pyload/pyload/security/advisories/GHSA-rfgh-63mg-8pwm referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pyload-ng | <0.5.0b3.dev97 <=0.5.0b3 |
0.5.0b3.dev97 |
Affected products
- pyload pyload
Classification
References
-
github.com
/pyload/pyload/commit/9ce88a8b01bed81aa17380c3288bb8c973e0859f
web
-
github.com
/pyload/pyload/security/advisories/GHSA-rfgh-63mg-8pwm
exploit, web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-40071
advisory
-
github.com
/pyload/pyload
package
-
github.com
/pypa/advisory-database/tree/main/vulns/pyload-ng/PYSEC-2026-2997.yaml
web
-
pypi.org
/project/pyload-ng
web, package
-
github.com
/advisories/GHSA-rfgh-63mg-8pwm
advisory
Sources
- CVE List CVE-2026-40071
- GitHub Advisory GHSA-rfgh-63mg-8pwm
- NVD CVE-2026-40071
- OSV PYSEC-2026-2997
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.