CVE-2026-55956
published 2026-06-29CVE-2026-55956: Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission…
PriorityP340medium6.5CVSS 3.1
AVNACLPRNUINSUCLILAN
EPSS
0.41%
33.3th percentile
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
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, from 7.0.0 through 7.0.109. 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 fix the issue.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | tomcat | < 9.0.119 | 9.0.119 |
| apache | tomcat | — | — |
| apache | tomcat | >= 10.1.0 < 10.1.56 | 10.1.56 |
| apache | tomcat | >= 11.0.0 < 11.0.23 | 11.0.23 |
| apache_software_foundation | apache_tomcat | 10.1.0-M1 – 10.1.55 | — |
| apache_software_foundation | apache_tomcat | 11.0.0-M1 – 11.0.22 | — |
| apache_software_foundation | apache_tomcat | 7.0.0 – 7.0.109 | — |
| apache_software_foundation | apache_tomcat | 8.5.0 – 8.5.100 | — |
| apache_software_foundation | apache_tomcat | 9.0.0.M1 – 9.0.118 | — |
| debian | tomcat10 | — | — |
| debian | tomcat11 | — | — |
| debian | tomcat9 | — | — |
| pki-deps_10.6 | pki-servlet-engine | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
vendor_redhat6.5MEDIUM
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VulDB
Apache Tomcat up to 11.0.22 improper authorization (EUVD-2026-40232)
vuldb·2026-06-30
CVE-2026-55956 [CRITICAL] Apache Tomcat up to 11.0.22 improper authorization (EUVD-2026-40232)
A vulnerability labeled as critical has been found in Apache Tomcat up to 11.0.22. This affects an unknown part. The manipulation results in improper authorization.
This vulnerability is identified as CVE-2026-55956. The attack can be executed remotely. There is not any exploit available.
The affected component should be upgraded.
GHSA
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
ghsa_unreviewed·2026-06-29
CVE-2026-55956 [MEDIUM] CWE-285 Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
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, from 7.0.0 through 7.0.109. 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 fix the issue.
Red Hat
tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
vendor_redhat·2026-06-29·CVSS 6.5
CVE-2026-55956 [MEDIUM] CWE-551 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
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, from 7.0.0 through 7.0.109. 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 fix the issue.
A flaw was found in Apache Tomcat where access control rules for the default servlet are improperly handled. An attacker can exploit this issue to bypass specific HTTP method
No detection rules found.
No public exploits indexed.
Hackernews
⚡ Weekly Recap: Proxy Botnets, Browser Ransomware, AI Agent Tricks, Fake PoC Malware and More
blogs_hackernews·2026-07-06
CVE-2026-48276 ⚡ Weekly Recap: Proxy Botnets, Browser Ransomware, AI Agent Tricks, Fake PoC Malware and More
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## ⚡ Weekly Recap: Proxy Botnets, Browser Ransomware, AI Agent Tricks, Fake PoC Malware and More
A streaming box should not need a threat model. Neither should a username field, a demo repo, a reset flow, or a browser permission prompt. That is the irritating part this week: the risky pieces were ordinary.
Home devices became a routing cover. Clean code pulled dirt from a dependency. Identity shortcuts aged badly. AI systems trusted the wrong instructions. Same soft spot throughout: trust placed one layer too early.
Below is the full recap, since this is apparently what counted as a normal week.
## ⚡ Threat of the Week
Net
Bugzilla
CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass [fedora-all]
bugzilla·2026-07-08·CVSS 6.5
CVE-2026-55956 [MEDIUM] CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass [fedora-all]
CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
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, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected.
Users are reco
Bugzilla
CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
bugzilla·2026-06-29·CVSS 6.5
CVE-2026-55956 [MEDIUM] CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
CVE-2026-55956 tomcat: Apache Tomcat: Improper Authorization Allows Security Constraint Bypass
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint.
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, from 7.0.0 through 7.0.109. 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 fix the issue.
2026-06-29
Published