CVE-2026-18535Critical· 9.6▾ MidnightIBM 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.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 52.8 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Nov 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.3%
Last analysed / modified upstream
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.
api_connect >= 12.1.0.0 <= 12.1.1.2api_connect >= 10.0.8.0 <= 10.0.8.12IBM strongly recommends addressing the vulnerability now by upgrading to v12.1.1.3 Fix Central Link: https://www.ibm.com/support/pages/node/7290205
IBM strongly recommends addressing the vulnerability now by upgrading to 10.0.8.13
Fix Central Link: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm%7EWebSphere&product=ibm/WebSphere/IBM+API+Connect&release=10.0.8.12&platform=All&function=all
Connected by shared product, vendor, weakness, or advisory.
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