What is CVE-2026-27369?

CVE-2026-27369 is a high-severity vulnerability in Boldthemes Celeste, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-03-05.

How severe is CVE-2026-27369?

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

Deserialization in Boldthemes Celeste

CVE-2026-27369

Deserialization of Untrusted Data vulnerability in BoldThemes Celeste celeste allows Object Injection.This issue affects Celeste: from n/a through <= 1.3.6.

Vulnerability class: Insecure Deserialization

EPSS: 0.003 (23.1th percentile) — read the EPSS interpretation.

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

Boldthemes Celeste — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-27369?: CVE-2026-27369 is a high-severity vulnerability in Boldthemes Celeste, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-03-05.
How severe is CVE-2026-27369?: High severity. CVSS v3 base score is 8.1 out of 10.