Deserialization in Alfresco Activiti
CVE-2026-3967
A flaw has been found in Alfresco Activiti up to 7.19/8.8.0. Affected by this issue is the function deserialize/createObjectInputStream of the file activiti-core/activiti-engine/src/main/java/org/activiti/engine/impl/variable/SerializableType.java of the component Process Variable Serialization System. This manipulation causes deserialization. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.002 (15.5th percentile) — read the EPSS interpretation.
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
- Alfresco Activiti — versions 7.0, 7.1, 7.2
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 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-3967?
- CVE-2026-3967 is a medium-severity vulnerability in Alfresco Activiti, classified under Improper Input Validation. CVSS score: 6.3/10. Published 2026-03-12.
- How severe is CVE-2026-3967?
- Medium severity. CVSS v3 base score is 6.3 out of 10.