CVE-2026-42314 json
pyLoad: Path Traversal via Package Folder Name
published 2026-05-05 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-29122 , GHSA-97r3-5w84-r4q8 , PYSEC-2026-128
- cvss
- 6.5
- 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 27%
- public exploits
- 0
- none known
Summary
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, package folder names are sanitized using insufficient string replacement. The pattern ....// becomes .._ after replacement (partial removal), leaving .. which can be exploited when the path is later resolved by the OS. 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
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/pyload/pyload/security/advisories/GHSA-97r3-5w84-r4q8 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pyload-ng | <0.5.0b3.dev100 |
0.5.0b3.dev100 |
Affected products
- pyload pyload
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/pyload/pyload/security/advisories/GHSA-97r3-5w84-r4q8
exploit, web, vendor-advisory, evidence
-
nvd.nist.gov
/vuln/detail/CVE-2026-42314
advisory
-
github.com
/pyload/pyload
package
-
github.com
/pypa/advisory-database/tree/main/vulns/pyload-ng/PYSEC-2026-128.yaml
web
Sources
- CVE List CVE-2026-42314
- GitHub Advisory GHSA-97r3-5w84-r4q8
- NVD CVE-2026-42314
- OSV PYSEC-2026-128
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.