CVE-2026-6936Network attack vector

Authenticated service interruption via recursive source compilation

Published May 27, 2026 · Updated May 27, 2026

Uncontrolled recursion in the ILE compiler in IBM operating system releases 7.3 through 7.6 allows remote authenticated users to interrupt service. IBM identifies recursion during compilation of a specific combination of crafted source statements but does not disclose the affected compiler routine. Reachability requires credentials and permission to compile source; IBM reports availability loss only and does not state whether the compiler hangs or crashes.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in the ILE compiler in IBM operating system releases 7.3 through 7.6 allows remote authenticated users to interrupt service. IBM identifies recursion during compilation of a specific combination of crafted source statements but does not disclose the affected compiler routine. Reachability requires credentials and permission to compile source; IBM reports availability loss only and does not state whether the compiler hangs or crashes.

The record

CVE
CVE-2026-6936
Published
May 27, 2026
Updated
May 27, 2026
Vendor
OpenBMC Project
Product
IBM i
Classifications
CWE-674, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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?

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

  1. Affected versionversion=7.3
  2. Affected versionversion=7.4
  3. Affected versionversion=7.5 <=12.1.4
  4. Affected versionversion=7.6 <=11.5.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenBMC Project · IBM iversion=7.3; version=7.4; version=7.5 <=12.1.4; version=7.6 <=11.5.9

Published CVSS scores

6.5IBMCVSS:3.1/AV:N/AC:L/PR:L/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499.004Application 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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