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9.6 Critical

CVE-2026-18535 IBM API Connect Denial of Service

Description

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are vulnerable to a Regular Expression Denial of Service (ReDoS) attack and to improper neutralisation of wildcard query operators.

CVSS 3.1 detail

Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector
Network
Attack complexity
Low
Privileges required
Low
Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
High

Affected products and versions

Product Affected versions Fixed in
API Connect 12.1 12.1.0.0 → 12.1.1.2 No fix stated
API Connect 10.0 10.0.8.0 → 10.0.8.12 No fix stated

Other CVEs of API Connect

The 286 CVEs of API Connect →
CVE-2026-19124 Multiple Vulnerabilities in IBM API Connect 6.8 Medium CVE-2026-17393 Multiple Vulnerabilities in IBM API Connect 5.1 Medium CVE-2026-17386 Multiple Vulnerabilities in IBM API Connect 8.1 High CVE-2026-17384 Multiple Vulnerabilities in IBM API Connect 8.5 High
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