Is CVE-2026-3967 actively exploited?

No active exploitation of CVE-2026-3967 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3967 be exploited remotely?

Yes. CVE-2026-3967 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3967?

CVE-2026-3967 has a CVSS score of 6.3 (MEDIUM).

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MEDIUM

CVE-2026-3967

CWE-20Published: March 12, 2026· Updated: Mar 12, 2026

6.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.0th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-3967 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.