GitHub Advisoryadvisory · Maven
GHSA-h6fc-48rj-7qqh Apache Tomcat - Digest authenticator will authenticate any unknown user
CRITICAL
Official page ↗
- Aliases
- CVE-2026-43512
- Ecosystem
- Maven
- Packages
- org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat:tomcat, org.apache.tomcat:tomcat-catalina
- Severity
- Critical
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-287
- Reviewed
- 2026-05-18
Affected packages
• Maven org.apache.tomcat.embed:tomcat-embed-core: < 9.0.118 → fixed in 9.0.118
• Maven org.apache.tomcat.embed:tomcat-embed-core: >= 10.1.0-M1, < 10.1.55 → fixed in 10.1.55
• Maven org.apache.tomcat.embed:tomcat-embed-core: >= 11.0.0-M1, < 11.0.22 → fixed in 11.0.22
• Maven org.apache.tomcat:tomcat: < 9.0.118 → fixed in 9.0.118
• Maven org.apache.tomcat:tomcat: >= 10.1.0-M1, < 10.1.55 → fixed in 10.1.55
• Maven org.apache.tomcat:tomcat: >= 11.0.0-M1, < 11.0.22 → fixed in 11.0.22
• Maven org.apache.tomcat:tomcat-catalina: < 9.0.118 → fixed in 9.0.118
• Maven org.apache.tomcat:tomcat-catalina: >= 10.1.0-M1, < 10.1.55 → fixed in 10.1.55
• Maven org.apache.tomcat:tomcat-catalina: >= 11.0.0-M1, < 11.0.22 → fixed in 11.0.22
Description
Versions Affected:
Apache Tomcat 11.0.0-M1 to 11.0.21
Apache Tomcat 10.1.0-M1 to 10.1.54
Apache Tomcat 9.0.0.M1 to 9.0.117
Older, unsupported versions may also be affected
Description:
When DIGEST authentication was configured, any user not known to the
configured Realm would be authenticated if they presented the password
"null".
Mitigation:
Users of the affected versions should apply one of the following
mitigations:
• Upgrade to Apache Tomcat 11.0.22 or later
• Upgrade to Apache Tomcat 10.1.55 or later
• Upgrade to Apache Tomcat 9.0.118 or later
Related
Alias · CVE (1)
- CVE-2026-43512 DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. vulnerability
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-43512 advisory
- https://github.com/apache/tomcat/commit/3d4d3fae07a6cd9c2eb193c5491001740ec64448 web
- https://github.com/apache/tomcat/commit/6565a6cb6499e56fe2f34457cec99f9d1c4f39e9 web
- https://github.com/apache/tomcat/commit/a99c355e8199adbfd67c9a1fffbd85b810b196cd web
- https://lists.apache.org/thread/7x09x7o12solvclslw3sz0288xc8wx73 web
- https://tomcat.apache.org/security-10.html web
- https://tomcat.apache.org/security-11.html web
- https://tomcat.apache.org/security-9.html web
- http://www.openwall.com/lists/oss-security/2026/05/12/8 web