CVE-2026-18047Network attack vector

Unauthenticated service-state changes via trailing-slash routing

Published Jul 28, 2026 · Updated Jul 28, 2026

Authentication bypass in Dogtag PKI ACME responders allows remote attackers to enable or disable the service through crafted URLs. Tomcat applies exact-match web.xml constraints, but RESTEasy normalizes a trailing slash and routes the request to handlers that call database.setEnabled() without authorization. Network access to a deployed ACME responder is sufficient; repeated disable requests can persistently interrupt ACME service.

CVSS severity6.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Dogtag PKI ACME responders allows remote attackers to enable or disable the service through crafted URLs. Tomcat applies exact-match web.xml constraints, but RESTEasy normalizes a trailing slash and routes the request to handlers that call database.setEnabled() without authorization. Network access to a deployed ACME responder is sufficient; repeated disable requests can persistently interrupt ACME service.

The record

CVE
CVE-2026-18047
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
389 Directory Server
Product
Red Hat Certificate System
Classifications
CWE-288, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat Certificate SystemAffected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

Published CVSS scores

6.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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