Vulnerability details
CVE-2026-55276
Apache Software Foundation Apache Tomcat
Apache Tomcat: Logged effective web.xml is incomplete
CVSS 3.1
9.1Critical
Official description
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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.1Critical | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 10.1.0-M1 ≤ v ≤ 10.1.55 | CVEProject cvelistV5 (CNA) |
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 ≤ v ≤ 11.0.22 | CVEProject cvelistV5 (CNA) |
| Apache Software Foundation | Apache Tomcat | 8.5.0 ≤ v ≤ 8.5.100 | CVEProject cvelistV5 (CNA) |
| Apache Software Foundation | Apache Tomcat | 9.0.0.M1 ≤ v ≤ 9.0.118 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-06-30
- Last updated
- 2026-06-30
- State
- Published
- Assigner (CNA)
- apache
Exploit prediction (EPSS)
0.6%
Probability of exploitation in 30 days
49.2%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-670Always-Incorrect Control Flow Implementation