CVE-2026-55957
tomcat: Missing Critical Step in Authentication vulnerability in Apache Tomcat when the JNDIRealm was configured to authentic...
CVE-2026-55957 is fixed in 25 products on 1 platform, first by ALAS2023-2025-910, released March 26, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.3
important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0286
86th percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| tomcat · RHEL 10 | 10.1.49-1.el10_0 | RHSA-2026:67164 | Jun 29, 2026 |
| tomcat · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat · rocky 8 | 1:9.0.120-1.el8_10 | RLSA-2026:68677 | Sep 19, 2026 |
| tomcat-admin-webapps · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat-admin-webapps · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat-admin-webapps · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat-admin-webapps · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat-docs-webapp · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat-docs-webapp · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat-docs-webapp · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat-docs-webapp · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat-el-3.0-api · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat-el-3.0-api · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat-el-3.0-api · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat-el-3.0-api · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat-jsp-2.3-api · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat-jsp-2.3-api · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat-jsp-2.3-api · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat-jsp-2.3-api · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat-lib · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat-lib · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat-lib · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat-lib · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat-servlet-4.0-api · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat-servlet-4.0-api · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat-servlet-4.0-api · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat-servlet-4.0-api · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat-webapps · RHEL 8 | 1:9.0.120-1.el8_10 | RHSA-2026:68677 | Sep 19, 2026 |
| tomcat-webapps · RHEL 9 | 1:9.0.110-2.el9_8 | RHSA-2026:18916 | May 27, 2026 |
| tomcat-webapps · almalinux 8 | 1:9.0.120-1.el8_10 | ALSA-2026:68677 | Sep 17, 2026 |
| tomcat-webapps · ol 8 | 1:9.0.120-1.el8_10 | ELSA-2026-68677 | Sep 17, 2026 |
| tomcat10 · Debian 12.15 (bookworm) | 10.1.52-1~deb12u1 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat10 · Debian 13.5 (trixie) | 10.1.52-1~deb13u1 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat10 · Debian 14 | 10.1.40-1 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat10 · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat10-admin-webapps · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat10-docs-webapp · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat10-el-5.0-api · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat10-jsp-3.1-api · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat10-lib · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat10-servlet-6.0-api · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat10-webapps · amzn 2023 | 1:10.1.39-1.amzn2023.0.1 | ALAS2023-2025-910 | Mar 26, 2025 |
| tomcat11 · Debian 13.5 (trixie) | 11.0.15-1~deb13u1 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat11 · Debian 14 | 11.0.5-1 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat9 · Debian 12.15 (bookworm) | 9.0.70-2 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat9 · Debian 13.5 (trixie) | 9.0.70-2 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat9 · Debian 14 | 9.0.70-2 | DEBIAN-CVE-2026-55957 | Jun 30, 2026 |
| tomcat9 · RHEL 10 | 9.0.120-1.el10_0 | RHSA-2026:67163 | May 27, 2026 |
| tomcat9 · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
| tomcat9-admin-webapps · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
| tomcat9-docs-webapp · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
| tomcat9-el-3.0-api · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
| tomcat9-jsp-2.3-api · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
| tomcat9-lib · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
| tomcat9-servlet-4.0-api · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
| tomcat9-webapps · amzn 2023 | 1:9.0.102-1.amzn2023.0.1 | ALAS2023-2025-911 | Mar 26, 2025 |
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