What is CVE-2026-76800?

CVE-2026-76800 is a medium-severity vulnerability in Dedecms, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-08-20.

How severe is CVE-2026-76800?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Arbitrary file upload in Dedecms

CVE-2026-76800

A flaw has been found in DeDeCMS 3. Affected by this vulnerability is an unknown functionality of the file /include/dialog/select_media_post.php. Executing a manipulation of the argument uploadfile can lead to unrestricted upload. The attack can be executed remotely. The exploit has been published and may be used.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

N/a Dedecms — versions 3

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (exploit)

Frequently asked questions

What is CVE-2026-76800?: CVE-2026-76800 is a medium-severity vulnerability in Dedecms, classified under Improper Access Control. CVSS score: 6.3/10. Published 2026-08-20.
How severe is CVE-2026-76800?: Medium severity. CVSS v3 base score is 6.3 out of 10.