What is CVE-2026-65182?

CVE-2026-65182 is a critical-severity vulnerability in Apache Tomcat, classified under Improper Access Control. CVSS score: 9.1/10. Published 2026-08-25.

How severe is CVE-2026-65182?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Apache Tomcat

CVE-2026-65182

Improper Access Control, Incorrect Authorization vulnerability in Apache Tomcat leads to security constraint bypass if a constraint for a longer path is specified before a more restrictive constraint for a shorter sub-path. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.25, 10.1.58, 9.0.121, which fixes the issue.

Published 2026-08-25 · last modified 2026-08-27.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (43.6th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.005 · change: -0.001

Affected products

Weakness classification (CWE)

References

lists.apache.org/thread/joosxvzc9b49ttj8lj0jw9mqt0ml767m (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-65182?: CVE-2026-65182 is a critical-severity vulnerability in Apache Tomcat, classified under Improper Access Control. CVSS score: 9.1/10. Published 2026-08-25.
How severe is CVE-2026-65182?: Critical severity. CVSS v3 base score is 9.1 out of 10.