CVE-2026-4337 PUBLISHED

Unrestricted Upload of File in PuMuKIT application

Assigner: INCIBE
Reserved: 17.03.2026 Published: 27.10.2026 Updated: 27.10.2026

Unrestricted Upload of File with Dangerous Type vulnerability in the PuMuKIT application allows a unauthenticated user to upload any type of file to the server, and to any path where the web server user has write permissions. This could also allow them to delete files.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L
CVSS Score: 8.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	Low
Attack Complexity	Low	Integrity	High	Integrity	Low
Attack Requirements	None	Availability	High	Availability	Low
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	PuMuKIT
Product	PuMuKIT
Versions	Default: affected Version current version is affected

Credits

David Herrero de la Peña finder

References

https://www.incibe.es/en/incibe-cert/notices/aviso/unrestricted-upload-file-pumukit-application

Problem Types

CWE-434 Unrestricted upload of file with dangerous type CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs