CVE-2026-8855: high-severity vulnerability in IBM HTTP Server
IBM HTTP Server is affected by multiple vulnerabilities
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.1epss 0.5%
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).
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
IBM · HTTP ServerRelated CVEs — IBM HTTP Server
In the same product, most dangerous first.
CVE-2023-26281MEDIUMIBM HTTP Server denial of serviceEPSS 1.1%CVE-2026-9170CRITICALIBM HTTP Server is affected by multiple vulnerabilitiesEPSS 0.5%CVE-2026-8850HIGHIBM HTTP Server is affected by multiple vulnerabilitiesEPSS 0.4%CVE-2026-8854HIGHIBM HTTP Server is affected by multiple vulnerabilitiesEPSS 0.4%CVE-2026-8834HIGHIBM HTTP Server is affected by multiple vulnerabilitiesEPSS 0.3%CVE-2026-8835HIGHIBM HTTP Server is affected by multiple vulnerabilitiesEPSS 0.3%