CVE-2026-43512

Apache Tomcat: Digest authenticator will authenticate any unknown user

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

Apache Software Foundation · Apache Tomcat

CVSS v3.1 CNA

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

EPSS

1.33% chance of exploitation in the next 30 days, 71st percentile

Published

2026-05-12

Updated

2026-05-14

Proof-of-concept exploits (1)

• covepseng/cve-2026-43512-poc2★ · 2026-06-19

Security advisories

• https://lists.apache.org/thread/7x09x7o12solvclslw3sz0288xc8wx73
• http://www.openwall.com/lists/oss-security/2026/05/12/8
• advisories/GHSA-h6fc-48rj-7qqh

References

• CVE Record
• NVD entry

Related

• CVE-2026-102268
• CVE-2026-43515
• CVE-2026-49352
• CVE-2026-9558