CVE-2026-65182Network attack vector

Unauthorized resource access via constraint ordering

Published Aug 25, 2026 · Updated Aug 25, 2026

Incorrect authorization in affected Apache Tomcat releases allows remote attackers to access protected resources via crafted HTTP requests. Security constraint processing honors an earlier longer-path rule instead of applying the more restrictive rule for its shorter subpath. Exposure requires that rule ordering, and the bypass grants only the resource access permitted by the less restrictive constraint.

CVSS severity9.1
Critical
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in affected Apache Tomcat releases allows remote attackers to access protected resources via crafted HTTP requests. Security constraint processing honors an earlier longer-path rule instead of applying the more restrictive rule for its shorter subpath. Exposure requires that rule ordering, and the bypass grants only the resource access permitted by the less restrictive constraint.

The record

CVE
CVE-2026-65182
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
The Apache Software Foundation
Product
Apache Tomcat
Classifications
CWE-863, CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.1.0-M1 <=10.1.57
  2. Affected versionversion=11.0.0-M1 <=11.0.24
  3. Affected versionversion=7.0.0 <=7.0.109
  4. Affected versionversion=8.5.0 <=8.5.100
  5. Affected versionversion=9.0.0.M1 <=9.0.120

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Tomcatversion=10.1.0-M1 <=10.1.57; version=11.0.0-M1 <=11.0.24; version=7.0.0 <=7.0.109; version=8.5.0 <=8.5.100; version=9.0.0.M1 <=9.0.120

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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