What is CVE-2026-40733?

CVE-2026-40733 is a high-severity vulnerability in Mikado-themes Shiftup, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-06-17.

How severe is CVE-2026-40733?

High severity. CVSS v3 base score is 8.1 out of 10.

Deserialization in Mikado-themes Shiftup

CVE-2026-40733

Unauthenticated PHP Object Injection in ShiftUp <= 1.3 versions.

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mikado-themes Shiftup — versions n/a

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-40733?: CVE-2026-40733 is a high-severity vulnerability in Mikado-themes Shiftup, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-06-17.
How severe is CVE-2026-40733?: High severity. CVSS v3 base score is 8.1 out of 10.