CVE-2026-42313 json
pyload-ng: non-admin SETTINGS users can redirect all outbound traffic through an attacker-controlled proxy
published 2026-05-04 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-29121 , GHSA-pg67-9wjv-mr85 , PYSEC-2026-127
- cvss
- 8.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the set_config_value() API method (@permission(Perms.SETTINGS)) in src/pyload/core/api/__init__.py gates security-sensitive options behind a hand-maintained allowlist ADMIN_ONLY_CORE_OPTIONS. The allowlist contains ("proxy", "username") and ("proxy", "password") — which protect the proxy credentials — but it does not include ("proxy", "enabled"), ("proxy", "host"), ("proxy", "port"), or ("proxy", "type"). Any authenticated user with the non-admin SETTINGS permission can enable proxying and point pyload at any host they control. From that point, every outbound download, captcha fetch, update check, and plugin HTTP call is transparently routed through the attacker. This is a direct continuation of the fix family CVE-2026-33509 / CVE-2026-35463 / CVE-2026-35464 / CVE-2026-35586, each of which patched a different missed option in the same allowlist. This vulnerability is fixed in 0.5.0b3.dev100.
Patch / fix
- pypi pyload-ng 0.5.0b3.dev100
- pyload-ng_project pyload-ng 0.5.0b3.dev100
- pyload pyload 0.5.0b3.dev100
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 5 mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/pyload/pyload/security/advisories/GHSA-pg67-9wjv-mr85 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
| GitHub | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
| OSV | 3.1 | 8.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pyload-ng | <0.5.0b3.dev100 |
0.5.0b3.dev100 |
Affected products
- pyload pyload
Classification
References
-
github.com
/pyload/pyload/security/advisories/GHSA-pg67-9wjv-mr85
exploit, web, vendor-advisory, evidence
-
nvd.nist.gov
/vuln/detail/CVE-2026-42313
advisory
-
github.com
/advisories/GHSA-4744-96p5-mp2j
advisory
-
github.com
/advisories/GHSA-ppvx-rwh9-7rj7
advisory
-
github.com
/advisories/GHSA-r7mc-x6x7-cqxx
advisory
-
github.com
/advisories/GHSA-w48f-wwwf-f5fr
advisory
-
github.com
/pyload/pyload
package
-
github.com
/pypa/advisory-database/tree/main/vulns/pyload-ng/PYSEC-2026-127.yaml
web
Sources
- CVE List CVE-2026-42313
- GitHub Advisory GHSA-pg67-9wjv-mr85
- NVD CVE-2026-42313
- OSV PYSEC-2026-127
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.