Kiteworks Core has an Unrestricted Upload of File with Dangerous Type

published 2026-02-27 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-9065

cvss: 4.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks configuration allows uploading of arbitrary files without proper validation. Malicious administrators could exploit this to upload unauthorized file types to the system. Version 9.2.0 contains a patch for the issue.

Patch / fix

fixed in 2

accellion kiteworks 9.2.0
accellion kiteworks_managed_file_transfer 9.2.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 8 mo ago (2026-03-03)

Exploit prediction

1.81% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
NVD	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

kiteworks security-advisories

Classification

Weakness

CWE-434 Unrestricted Upload of File with Dangerous Type

References

github.com /kiteworks/security-advisories/security/advisories/GHSA-v8x9-vwg6-cj45
vendor-advisory

Sources

CVE List CVE-2026-28270
NVD CVE-2026-28270

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.

Summary