What is CVE-2026-27437?

CVE-2026-27437 is a critical-severity vulnerability in Themerex Tennis Club, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-05.

How severe is CVE-2026-27437?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Themerex Tennis Club

CVE-2026-27437

Deserialization of Untrusted Data vulnerability in ThemeREX Tennis Club tennis-sportclub allows Object Injection.This issue affects Tennis Club: from n/a through <= 1.2.3.

Vulnerability class: Insecure Deserialization

EPSS: 0.004 (30.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Themerex Tennis Club — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-27437?: CVE-2026-27437 is a critical-severity vulnerability in Themerex Tennis Club, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-03-05.
How severe is CVE-2026-27437?: Critical severity. CVSS v3 base score is 9.8 out of 10.