Paper/Archive/CVE-2026-43512

CVE-2026-43512

Apache Software Foundation Apache Tomcat — Apache Tomcat: Digest authenticator will authenticate any unknown user

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 71.0.710 × 2014.2 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Affected

ProductAffectedFixed inSource

Apache Tomcat11.0.0-M1 – 11.0.21–CNA

Apache Tomcat10.1.0-M1 – 10.1.54–CNA

Apache Tomcat9.0.0.M1 – 9.0.117–CNA

Apache Tomcat8.5.0 – 8.5.100–CNA

Apache Tomcat7.0.0 – 7.0.109–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/7x09x7o12solvclslw3sz0288xc8wx73 refopenwall.com/lists/oss-security/2026/05/12/8