CVE-2026-15567Network attack vector

Pre-auth service crash via oversized GSS allocation

Published Aug 11, 2026 · Updated Aug 11, 2026

Denial of service in WildFly IIOP on Red Hat JBoss EAP 7 and 8 allows remote attackers to crash the server via a crafted GSS token. CSIv2Util’s GSS token decoder trusts an attacker-controlled length without bounds checking and allocates a byte array of that size. The IIOP listener must be enabled and network-reachable; no authentication is required, and heap exhaustion interrupts hosted applications.

CVSS severity7.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in WildFly IIOP on Red Hat JBoss EAP 7 and 8 allows remote attackers to crash the server via a crafted GSS token. CSIv2Util’s GSS token decoder trusts an attacker-controlled length without bounds checking and allocates a byte array of that size. The IIOP listener must be enabled and network-reachable; no authentication is required, and heap exhaustion interrupts hosted applications.

The record

CVE
CVE-2026-15567
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
389 Directory Server
Product
Red Hat JBoss Enterprise Application Platform 8
Classifications
CWE-789, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat JBoss Enterprise Application Platform 8Affected versions are unavailable in this record.
389 Directory Server · Red Hat JBoss Enterprise Application Platform 7Affected versions are unavailable in this record.

Published CVSS scores

7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-789Memory Allocation with Excessive Size Value
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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