CVE-2026-8855

9.8 criticalEPSS 0.5%

Critical (9.8) in ibm http server. EPSS 0.5% chance of exploitation in the next 30 days.

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).

Severity

CVSS 3.1

9.8 critical

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-31)
CWE: CWE-94
Published: 2026-05-26
Modified: 2026-07-23
Record from: the NVD, synced 2026-10-19

Affected

ibm:http_server

References

https://www.ibm.com/support/pages/node/7274065

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