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.

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/SerializableT…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (19.0th 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

VDB-350396 | Alfresco Activiti Process Variable Serialization System SerializableType.java createObjectInputStream deserialization (technical-description, vdb-entry)
VDB-350396 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #768942 | Activiti <=7.20 or < 8.8.0 Deserialization (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.