CVE-2026-43512 Details
Description
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.
A vulnerability allowing authentication bypass in digest authentication has been identified in Apache Tomcat. This issue affects versions 11.0.0-M1 prior to 11.0.21, 10.1.0-M1 prior to 10.1.54, 9.0.0-M1 prior to 9.0.117, and 8.5.0 prior to 8.5.100. Older, unsupported versions may also be affected. The vulnerability arises because, when DIGEST authentication is enabled, any user not recognized by the configured Realm can be authenticated by presenting the password 'null'.
Users are advised to upgrade to Apache Tomcat 11.0.22, 10.1.55, or 9.0.118.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 14, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/05/12/8 | CVE | Mailing ListThird Party Advisory |
| https://lists.apache.org/thread/7x09x7o12solvclslw3sz0288xc8wx73 | [email protected] | Mailing ListVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-592 | DEPRECATED: Authentication Bypass Issues | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| apache tomcat | >= 7.0.0, <= 7.0.109 >= 8.5.0, <= 8.5.100 >= 9.0.0, < 9.0.118 >= 10.1.0, < 10.1.55 >= 11.0.0, < 11.0.22 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | Initial Analysis | [email protected] |
| May 14, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | CVE Modified | CVE |
| May 12, 2026 | New CVE Received | [email protected] |