UBUNTU-CVE-2026-43512
An authentication bypass vulnerability exists in the digest authentication mechanism of Apache Tomcat affecting multiple versions from 7.0.0 up to 11.0.21. This issue allows attackers to bypass authentication controls. Users are advised to upgrade to Apache Tomcat versions 11.0.22, 10.1.55, or 9.0.118 where the issue is fixed. The vulnerability affects numerous specific Ubuntu package versions of Tomcat. No known exploits in the wild have been reported.
AI Analysis
Technical Summary
This vulnerability in Apache Tomcat's digest authentication allows authentication bypass in affected versions ranging from 7.0.0 through 11.0.21 (including various minor versions and Ubuntu package builds). The issue is resolved in versions 11.0.22, 10.1.55, and 9.0.118. The vulnerability impacts multiple Ubuntu LTS and standard releases with specific package versions listed. It is classified as deprecated, indicating it may be superseded or no longer actively tracked, but the underlying issue remains relevant for affected versions.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to bypass authentication mechanisms, potentially gaining unauthorized access to protected resources. The CVSS vector indicates high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). No known exploits in the wild have been reported to date.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.22, 10.1.55, or 9.0.118 or later, as these versions contain the official fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these upgrade versions. No additional mitigations are specified.
UBUNTU-CVE-2026-43512
Description
An authentication bypass vulnerability exists in the digest authentication mechanism of Apache Tomcat affecting multiple versions from 7.0.0 up to 11.0.21. This issue allows attackers to bypass authentication controls. Users are advised to upgrade to Apache Tomcat versions 11.0.22, 10.1.55, or 9.0.118 where the issue is fixed. The vulnerability affects numerous specific Ubuntu package versions of Tomcat. No known exploits in the wild have been reported.
CVSS v3.1
Score 9.8critical
Affected software
pkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/[email protected]+esm2?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/[email protected]+esm2?arch=source&distro=esm-infra-legacy/xenialpkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-apps-legacy/xenialpkg:deb/ubuntu/[email protected]~18.04.3+esm6?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+esm8?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/[email protected]~esm4?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]~26.04.1?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache Tomcat's digest authentication allows authentication bypass in affected versions ranging from 7.0.0 through 11.0.21 (including various minor versions and Ubuntu package builds). The issue is resolved in versions 11.0.22, 10.1.55, and 9.0.118. The vulnerability impacts multiple Ubuntu LTS and standard releases with specific package versions listed. It is classified as deprecated, indicating it may be superseded or no longer actively tracked, but the underlying issue remains relevant for affected versions.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to bypass authentication mechanisms, potentially gaining unauthorized access to protected resources. The CVSS vector indicates high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). No known exploits in the wild have been reported to date.
Mitigation Recommendations
Users should upgrade affected Apache Tomcat installations to versions 11.0.22, 10.1.55, or 9.0.118 or later, as these versions contain the official fixes for this vulnerability. Patch status is confirmed by the vendor advisory recommending these upgrade versions. No additional mitigations are specified.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-43512
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a58b4b668715ace43da975d
Added to database: 07/16/2026, 10:38:46 UTC
Last enriched: 07/16/2026, 12:53:53 UTC
Last updated: 07/31/2026, 19:24:50 UTC
Views: 22
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