CVE-2026-55276

criticalpriority · track · 0EPSS 0.006 · 49 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.61% (49th) EPSS

CVSS 9.1 · critical

Is it mine?

38 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.3–9.1

v3.19.1criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondaryexploitability 3.9 · impact 5.2

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-670USCWE-670US

affected products (38)

Products and version ranges known to be affected.

Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Atlassian Bamboo≤ Data Center LTS <10.2.23cert_bundDE
Atlassian Bamboo≤ Data Center LTS <12.1.11cert_bundDE
Atlassian Bitbucket≤ Data Center <10.4.2cert_bundDE
Atlassian Bitbucket≤ Data Center <10.4.3cert_bundDE
Atlassian Bitbucket≤ Data Center LTS <10.2.6cert_bundDE
Atlassian Bitbucket≤ Data Center LTS <10.2.7cert_bundDE
Atlassian Bitbucket≤ Data Center LTS <9.4.24cert_bundDE
Atlassian Confluence≤ Data Center LTS <10.2.17cert_bundDE
Atlassian Confluence≤ Data Center LTS <10.2.18cert_bundDE
Atlassian Confluence≤ Data Center LTS <9.2.24cert_bundDE
Atlassian Confluence≤ Data Center LTS <9.2.25cert_bundDE
Atlassian Crucible< 4.9.14cert_bundDE
Atlassian Fisheye< 4.9.14cert_bundDE
Atlassian Jira≤ Data Center LTS <10.3.25cert_bundDE
Atlassian Jira≤ Data Center LTS <11.3.11cert_bundDE
Atlassian Jira≤ Service Management Data Center LTS <10.3.25cert_bundDE
Atlassian Jira≤ Service Management Data Center LTS <11.3.11cert_bundDE
Apache Software Foundation Apache Tomcat≤ 10.1.0-M1 ≤10.1.55enisa_euvdEU
Apache Software Foundation Apache Tomcat≤ 9.0.0.M1 ≤9.0.118enisa_euvdEU

showing 20 of 38

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2123Apache Tomcat: Mehrere SchwachstellenDeutsch2026-06-29csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache Tomcat ausnutzen, um Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand zu verursachen, Cross-Site-Scripting-Angriffe durchzuführen oder andere, nicht näher spezifizierte Auswirkungen auszulösen.
WID-SEC-W-2026-3043IBM QRadar SIEM: Mehrere SchwachstellenDeutsch2026-08-26csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen und um beliebigen Programmcode auszuführen.
WID-SEC-W-2026-3376Atlassian Bamboo, Bitbucket, Confluence, Fisheye/Crucible, Jira Software und Jira Service Management: Mehrere SchwachstellenDeutsch2026-09-15csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Bitbucket, Confluence, Fisheye/Crucible, Jira Software und Jira Service Management ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, serverseitige Request-Forgery-Angriffe (SSRF) durchzuführen, Cross-Site-Scripting-Angriffe zu starten, sensible Informationen offenzulegen, Daten zu manipulieren oder Denial-of-Service-Zustände herbeizuführen.
BIT-tomcat-2026-55276Apache Tomcat: Logged effective web.xml is incomplete2026-09-11vendor · osvUS
Always-Incorrect Control Flow Implementation vulnerability in Apache Tomcat meant that special roles and empty authorisation constraints were not included when the effective web.xml was logged. This issue affects Apache Tomcat: from 11.0.0 through 11.0.22, from 10.1.0 through 10.1.55, from 9.0.0 through 9.0.118, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119 which fixes the issue.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund osv NVD CVE.org MITRE

published 2026-06-29modified 2026-10-25

references (5)

External citations — patches, advisories, analysis.

scry

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