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Response snapshot Oct 29, 2026, 18:26 UTC

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VulnerabilityCVE-2026-15564

Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed.

Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed.

At a glance

Exploited
Not known
Severity
7.4 High (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
1 source

What to do

Check the vendor advisory for affected versions and fixes.

Read NVD CVE-2026-15564 (opens a new tab)

What happened

Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. An attacker who can gain access to the IIOP port may be able to construct and send malicious objects and achieve deserialization, if the target EJB allows untyped method parameters, and depending on the potential gadget chains available in the running classpath.

Scores and how they were measured

CVSS base severity

7.4

Version 3.1As of

CVSS:3.1/AV:L/AC:H/PR:N/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

Not available

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

Sources

  1. Primary source

    NVD CVE-2026-15564 (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

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  4. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  5. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

Cite this record

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

APA

KEVWire. (2026, October 29). Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. (CVE-2026-15564). https://kevwire.com/record/CVE-2026-15564

MLA

"Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. (CVE-2026-15564)." KEVWire, 29 Oct. 2026, kevwire.com/record/CVE-2026-15564.

Chicago

KEVWire. "Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. (CVE-2026-15564)." Last modified October 29, 2026. https://kevwire.com/record/CVE-2026-15564.

Evidence summary (plain text)

Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. (Oct 29, 2026).
Wildfly's IIOP listener may permit deserialization of input streams before authentication is performed. An attacker who can gain access to the IIOP port may be able to construct and send malicious objects and achieve deserialization, if the target EJB allows untyped method parameters, and depending on the potential gadget chains available in the running classpath.
CVSS 7.4 (version 3.1; evidence as of Oct 29, 2026; https://nvd.nist.gov/vuln/detail/CVE-2026-15564).
Sources:
NVD CVE-2026-15564: https://nvd.nist.gov/vuln/detail/CVE-2026-15564
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-29T16:56:00.604Z&lastModEndDate=2026-10-29T18:26:09.730Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-29T05:55:56.949Z&lastModEndDate=2026-10-29T07:25:56.572Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-29T05:25:58.299Z&lastModEndDate=2026-10-29T06:55:55.186Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-29T04:25:59.727Z&lastModEndDate=2026-10-29T06:25:55.761Z&resultsPerPage=500&startIndex=0
Record ID: CVE-2026-15564.
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: Oct 29, 2026, 18:26 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.

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