Vulnerability Details CVE-2026-8855
IBM HTTP Server 8.5, and 9.0 is vulnerable to remote code execution and denial of service in configurations with TLS mutual authentication (client authentication).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 52.4%
CVSS Severity
CVSS v3 Score 8.1
Products affected by CVE-2026-8855
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cpe:2.3:a:ibm:http_server:8.5.0.0
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cpe:2.3:a:ibm:http_server:8.5.5.23
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cpe:2.3:a:ibm:http_server:8.5.5.24
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cpe:2.3:a:ibm:http_server:8.5.5.6
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cpe:2.3:a:ibm:http_server:8.5.5.7
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cpe:2.3:a:ibm:http_server:9.0.0.0
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cpe:2.3:a:ibm:http_server:9.0.5.15
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cpe:2.3:a:ibm:http_server:9.0.5.16
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cpe:2.3:o:linux:linux_kernel:-
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cpe:2.3:o:microsoft:windows:-