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Response snapshot Nov 1, 2026, 04:21 UTC

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VulnerabilityCVE-2026-86404

EAP's Artemis deserialization configuration permits deserialization by default.

EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method.

At a glance

Exploited
Not known
Severity
8.8 High (CVSS 3.1)
Chance of exploitation
0.7% in the next 30 days
Sources
1 source

What to do

Check the vendor advisory for affected versions and fixes.

Read NVD CVE-2026-86404 (opens a new tab)

What happened

EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method. However, by default both allow-list and block-list are empty. When the allow-list is empty (size == 0), isTrustedType() returns true for ALL classes. This means all classes are deserializable by default.

Scores and how they were measured

CVSS base severity

8.8

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

0.7%

Scored Percentile 54.4%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Sources

  1. Primary source

    NVD CVE-2026-86404 (opens a new tab)

    NVD record: description, CVSS (the CNA score is preferred), affected products, and publication date. Not evidence of exploitation.

    Published Checked

  2. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  3. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2026-86404, scored 2026-10-31. This is a model estimate, not proof of exposure.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, November 1). EAP's Artemis deserialization configuration permits deserialization by default. (CVE-2026-86404). https://kevwire.com/record/CVE-2026-86404

MLA

"EAP's Artemis deserialization configuration permits deserialization by default. (CVE-2026-86404)." KEVWire, 1 Nov. 2026, kevwire.com/record/CVE-2026-86404.

Chicago

KEVWire. "EAP's Artemis deserialization configuration permits deserialization by default. (CVE-2026-86404)." Last modified November 1, 2026. https://kevwire.com/record/CVE-2026-86404.

Evidence summary (plain text)

EAP's Artemis deserialization configuration permits deserialization by default. (Sep 7, 2026).
EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method. However, by default both allow-list and block-list are empty. When the allow-list is empty (size == 0), isTrustedType() returns true for ALL classes. This means all classes are deserializable by default.
CVSS 8.8 (version 3.1; evidence as of Nov 1, 2026; https://nvd.nist.gov/vuln/detail/CVE-2026-86404).
EPSS 0.7% for the following 30 days, scored Oct 31, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-86404&date=2026-10-31).
Sources:
NVD CVE-2026-86404: https://nvd.nist.gov/vuln/detail/CVE-2026-86404
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-31T21:40:56.499Z&lastModEndDate=2026-11-01T02:30:56.177Z&resultsPerPage=500&startIndex=0
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2026-86404&date=2026-10-31
Record ID: CVE-2026-86404.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Nov 1, 2026, 04:01 UTC. Ingestion is not an independent editorial investigation.

NVD status: Awaiting Analysis. Publication in the NVD is not evidence of exploitation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

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