CVE-2026-76183

critical · 9.8

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.

9.8

CVSS

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EPSS (exploit prob.)

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EPSS percentile

2026-09-23

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-289

References

https://lists.apache.org/thread/45mxk8nj2q8pkhct6lfxkvtm2jpywrsp
http://www.openwall.com/lists/oss-security/2026/09/23/21

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-76183