Advisory details:
gitlab / maven/org.apache.tomcat/tomcat-websocket/CVE-2026-76183
| Advisory ID | gitlab/maven/org.apache.tomcat/tomcat-websocket/CVE-2026-76183 |
| Aliases |
CVE-2026-76183
|
| Summary | Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 0.0 |
| Risk | |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.tomcat/tomcat-websocket/CVE-2026-76183.yml |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/apache/tomcat/commit/e182d86b7d4cc19ec4c24c38f37acc004404fe8e | ||
| 45mxk8nj2q8pkhct6lfxkvtm2jpywrsp | Advisory | https://lists.apache.org/thread/45mxk8nj2q8pkhct6lfxkvtm2jpywrsp |
| CVE-2026-76183 | https://nvd.nist.gov/vuln/detail/CVE-2026-76183 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
There are no SSVC decisions available.