Critical 9.1Published Aug 25, 2026

CVE-2026-65182Apache Tomcat: Bypass longest prefix security constraint

Updated under an hour ago (2026-10-19 05:50 UTC)

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It affects Apache Software Foundation Apache Tomcat and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Tomcat

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-284, CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Aug 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Tomcat apache_software_foundation:apache_tomcat (from the name)	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; before 7.0.0 status unknown	CNA record
apache tomcat apache:tomcat	from 7.0.0 through 7.0.109; from 8.5.0 before 9.0.121; from 10.1.0 before 10.1.58; from 11.0.0 before 11.0.25	NVD

References

https://lists.apache.org/thread/joosxvzc9b49ttj8lj0jw9mqt0ml767mvendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/08/26/1third-party-advisory, mailing-list

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.