synced 3 MIN AGO
01 Record

CVE-2026-43512

Apache Tomcat: Digest authenticator will authenticate any unknown user

CriticalPUBLISHEDCNA: apache
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 Description

Apache Tomcat: Digest authenticator will authenticate any unknown user

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
1.32% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 70.4% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-26.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-05-12 15:24Z5 MO AGO
Last updated
2026-05-14 19:53Z5 MO AGO
Reserved
2026-05-01
Assigning CNA
apache
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-592DEPRECATED: Authentication Bypass IssuesDEPRECATED
  • CWE-303Incorrect Implementation of Authentication AlgorithmBase
Data version
5.2
Document digest
635af7b3b1f23e3adf33bbd3abd4faf63495a36dd8d7dfb322ef4f042d3b5efd

05 Affected products

VendorProductVersionsPlatforms
Apache Software FoundationApache Tomcat11.0.0-M1 to 11.0.21, 10.1.0-M1 to 10.1.54, 9.0.0.M1 to 9.0.117, 8.5.0 to 8.5.100, 7.0.0 to 7.0.109—

06 References

07 Fixed in

AlmaLinux 8

  • tomcat
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-admin-webapps
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-docs-webapp
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-el-3.0-api
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-lib
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-webapps
    Fixed in 1:9.0.120-1.el8_10

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • tomcat
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-admin-webapps
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-docs-webapp
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-el-3.0-api
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-lib
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-webapps
    Fixed in 1:9.0.120-2.el9_8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • tomcat
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-admin-webapps
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-docs-webapp
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-el-5.0-api
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-jsp-3.1-api
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-lib
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-servlet-6.0-api
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-webapps
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat9
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-admin-webapps
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-docs-webapp
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-el-3.0-api
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-jsp-2.3-api
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-lib
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-servlet-4.0-api
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-webapps
    Fixed in 1:9.0.120-1.el10_2.alma.1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • tomcat
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-admin-webapps
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-docs-webapp
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-el-3.0-api
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-lib
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.120-1.el8_10
  • tomcat-webapps
    Fixed in 1:9.0.120-1.el8_10

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • tomcat
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-admin-webapps
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-docs-webapp
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-el-3.0-api
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-jsp-2.3-api
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-lib
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-servlet-4.0-api
    Fixed in 1:9.0.120-2.el9_8
  • tomcat-webapps
    Fixed in 1:9.0.120-2.el9_8

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • tomcat
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-admin-webapps
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-docs-webapp
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-el-5.0-api
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-jsp-3.1-api
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-lib
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-servlet-6.0-api
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat-webapps
    Fixed in 1:10.1.49-4.el10_2.alma.1
  • tomcat9
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-admin-webapps
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-docs-webapp
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-el-3.0-api
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-jsp-2.3-api
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-lib
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-servlet-4.0-api
    Fixed in 1:9.0.120-1.el10_2.alma.1
  • tomcat9-webapps
    Fixed in 1:9.0.120-1.el10_2.alma.1

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • tomcat10
    Fixed in 10.1.55-1~deb12u1
  • tomcat9
    Fixed in 9.0.70-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • tomcat10
    Fixed in 10.1.55-1~deb13u1
  • tomcat11
    Fixed in 11.0.22-1~deb13u1
  • tomcat9
    Fixed in 9.0.70-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • tomcat10
    Fixed in 10.1.55-1
  • tomcat11
    Fixed in 11.0.22-1
  • tomcat9
    Fixed in 9.0.70-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • tomcat10
    Fixed in 10.1.40-1ubuntu1.25.10.1
  • tomcat11
    No fix yet
  • tomcat9
    Fixed in 9.0.95-1ubuntu1.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • tomcat10
    Fixed in 10.1.40-1ubuntu1.26.04.1
  • tomcat11
    No fix yet
  • tomcat9
    Fixed in 9.0.115-1ubuntu0.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • tomcat6
    Fixed in 6.0.39-1ubuntu0.1+esm3
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
  • tomcat7
    Fixed in 7.0.52-1ubuntu0.16+esm2
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • tomcat7
    Fixed in 7.0.68-1ubuntu0.4+esm4
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
  • tomcat8
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • tomcat8
    No fix yet
  • tomcat9
    Fixed in 9.0.16-3ubuntu0.18.04.2+esm8
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • tomcat9
    Fixed in 9.0.31-1ubuntu0.9+esm3
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 22.04 LTS

  • tomcat9
    Fixed in 9.0.58-1ubuntu0.2+esm4
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 24.04 LTS

  • tomcat10
    Fixed in 10.1.16-1ubuntu0.1~esm4
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • tomcat9
    Fixed in 9.0.70-2ubuntu0.1+esm3
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.