What is CVE-2026-28271?

CVE-2026-28271 is a medium-severity vulnerability in Accellion Kiteworks, classified under CWE-350. CVSS score: 6.5/10. Published 2026-02-27.

How severe is CVE-2026-28271?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SSRF in Accellion Kiteworks

CVE-2026-28271

Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks configuration functionality allows bypassing of SSRF protections through DNS rebinding attacks. Malicious administrators could exploit this to…

EPSS: 0.004 (34.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Accellion Kiteworks
Kiteworks Security-advisories — versions < 9.2.0

Weakness classification (CWE)

CWE-350
CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-28271?: CVE-2026-28271 is a medium-severity vulnerability in Accellion Kiteworks, classified under CWE-350. CVSS score: 6.5/10. Published 2026-02-27.
How severe is CVE-2026-28271?: Medium severity. CVSS v3 base score is 6.5 out of 10.