Paper/Archive/CVE-2026-86248

CVE-2026-86248

Apache Software Foundation Apache Tomcat — Apache Tomcat: Fix for CVE-2026-34500 was incomplete. OCSP checks sometimes soft-fail with FFM even when soft-fail is disabled

EPSS 0.5%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 42.6.426 × 208.5 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.25, from 10.1.22 through 10.1.59, from 9.0.92 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

Affected

ProductAffectedFixed inSource

Apache Tomcat11.0.0-M14 – 11.0.25–CNA

Apache Tomcat10.1.22 – 10.1.59–CNA

Apache Tomcat9.0.92 – 9.0.121–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/thread/nmkmjp9l53y8h3oc4n8fc0bkw9dv15sk