Fluid Attacks Database

Description

Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authenticate binds using GSSAPI allowed attackers to authenticate without provided the correct password. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.4, from 10.1.0-M1 through 10.1.36, from 9.0.0.M1 through 9.0.100, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.5, 10.1.37 or 9.0.101, which fixes the issue.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
debian 12	tomcat10	=10.1.10-1 \|\| =10.1.13-1 \|\| =10.1.14-1 \|\| =10.1.15-1 \|\| =10.1.16-1 \|\| =10.1.20-1 \|\| =10.1.23-1 \|\| =10.1.25-1 \|\| =10.1.25-1~bpo12+1 \|\| =10.1.25-2 \|\| =10.1.30-1 \|\| =10.1.30-1~bpo12+1 \|\| =10.1.31-1 \|\| =10.1.33-1 \|\| =10.1.33-1~bpo12+1 \|\| =10.1.34-0+deb12u1 \|\| =10.1.34-0+deb12u2 \|\| =10.1.34-1 \|\| =10.1.35-1 \|\| =10.1.40-1 \|\| =10.1.40-1~bpo12+1 \|\| =10.1.46-1 \|\| =10.1.6-1 \|\| =10.1.6-1+deb12u1 \|\| =10.1.6-1+deb12u2 \|\| =10.1.7-1 \|\| =10.1.8-1 \|\| =10.1.9-1 \|\| >=0 <10.1.52-1~deb12u1	10.1.52-1~deb12u1
debian 13	tomcat10	=10.1.40-1 \|\| =10.1.46-1 \|\| =10.1.52-1~deb12u1 \|\| >=0 <10.1.52-1~deb13u1	10.1.52-1~deb13u1
debian 11	tomcat9	=9.0.43-1 \|\| =9.0.43-2 \|\| =9.0.43-2~deb11u1 \|\| =9.0.43-2~deb11u10 \|\| =9.0.43-2~deb11u11 \|\| =9.0.43-2~deb11u12 \|\| =9.0.43-2~deb11u2 \|\| =9.0.43-2~deb11u3 \|\| =9.0.43-2~deb11u4 \|\| =9.0.43-2~deb11u5 \|\| =9.0.43-2~deb11u6 \|\| =9.0.43-2~deb11u7 \|\| =9.0.43-2~deb11u8 \|\| =9.0.43-2~deb11u9 \|\| =9.0.43-3 \|\| =9.0.53-1 \|\| =9.0.54-1 \|\| =9.0.55-1 \|\| =9.0.58-1 \|\| =9.0.62-1 \|\| =9.0.63-1 \|\| =9.0.64-1 \|\| =9.0.64-2 \|\| =9.0.65-1 \|\| =9.0.67-1 \|\| =9.0.68-1 \|\| =9.0.68-1.1 \|\| =9.0.70-1 \|\| >=0 <9.0.70-2	9.0.70-2
debian 13	tomcat9	>=0 <9.0.70-2	9.0.70-2
debian 14	tomcat10	>=0 <10.1.40-1	10.1.40-1
debian 14	tomcat9	>=0 <9.0.70-2	9.0.70-2
debian 13	tomcat11	=11.0.11-1 \|\| =11.0.6-1 \|\| >=0 <11.0.15-1~deb13u1	11.0.15-1~deb13u1
debian 14	tomcat11	>=0 <11.0.5-1	11.0.5-1
debian 12	tomcat9	>=0 <9.0.70-2	9.0.70-2
rpm rhel8	pki-servlet-engine	-	-

1-10 of 17

Aliases

1. CVE-2026-559572. NVD-2026-559573. OSV-DEBIAN-2026-559574. OSV-2026-559575. SECURITY-TRACKER-CVE-2026-55957

References

1. https://github.com/mdvpat/CVE-2026-55957-PoC

Does your application use this vulnerable software?

During the free trial, our tools assess your application, identify vulnerabilities, and provide recommendations for their remediation.