Unrestricted Upload of File in PuMuKIT application

published 2026-10-27 12 d ago modified 2026-11-04 4 d ago also EUVD-2026-110807

cvss: 8.8; version 4.0, 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

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.

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 4 d ago (2026-11-04)

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.8	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
CNA	4.0	8.8	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

PuMuKIT PuMuKIT

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

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

Sources

CVE List CVE-2026-4337
NVD CVE-2026-4337

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Summary