CVE-2026-78543Network attack vector

Unauthenticated service interruption via infinite loop

Published Sep 4, 2026 · Updated Sep 4, 2026

Infinite-loop denial of service in affected IBM App Connect Enterprise and Integration Bus for z/OS releases allows remote attackers to interrupt service. IBM identifies the affected code only as Adapter nodes and has not published the input, protocol, or loop locus that fails to terminate. Unauthenticated network access is sufficient; affected releases span App Connect Enterprise 12.0.1.0 through 12.0.12.28 and 13.0.1.0 through 13.0.8.1, plus Integration Bus for z/OS 10.1.0.0 through 10.1.0.7.

CVSS severity5.3
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Infinite-loop denial of service in affected IBM App Connect Enterprise and Integration Bus for z/OS releases allows remote attackers to interrupt service. IBM identifies the affected code only as Adapter nodes and has not published the input, protocol, or loop locus that fails to terminate. Unauthenticated network access is sufficient; affected releases span App Connect Enterprise 12.0.1.0 through 12.0.12.28 and 13.0.1.0 through 13.0.8.1, plus Integration Bus for z/OS 10.1.0.0 through 10.1.0.7.

The record

CVE
CVE-2026-78543
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
OpenBMC Project
Product
Integration Bus for z/OS
Classifications
CWE-835, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.1.0.0 <=10.1.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenBMC Project · Integration Bus for z/OSversion=10.1.0.0 <=10.1.0.7
IBM · App Connect Enterpriseversion=12.0.1.0 <=12.0.12.28; version=13.0.1.0 <=13.0.8.1

Published CVSS scores

5.3IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo