CVE-2026-18047Medium· 6.5▾ SunlitA flaw was found in Dogtag PKI's ACME responder where the web.xml security constraints use exact URL pattern matching for admin-only enable/disable endpoints. By appending a trailing slash to the URL, an unauthenticated attacker can bypa…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.5%
A flaw was found in Dogtag PKI's ACME responder where the web.xml security constraints use exact URL pattern matching for admin-only enable/disable endpoints. By appending a trailing slash to the URL, an unauthenticated attacker can bypass the Tomcat authentication constraint while RESTEasy still routes the request to the handler, allowing unauthorized toggling of the ACME service state including persistent denial of service.
redhat-pki:10/redhat-pki (all versions)redhat-pki (all versions)pki-coreredhat-pkidogtag-pki (all versions)pki-corepki-core (all versions)pki-core:10.6/pki-core (all versions)pki-core (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
To mitigate this vulnerability, change the URL patterns in the ACME responder's web.xml from exact-match to prefix-match. Edit the file /usr/share/pki/acme/webapps/acme/WEB-INF/web.xml and replace the url-pattern entries for the enable and disable endpoints:
<url-pattern>/enable</url-pattern> -> <url-pattern>/enable/</url-pattern> <url-pattern>/disable</url-pattern> -> <url-pattern>/disable/</url-pattern>
Then restart the PKI server for the changes to take effect.
Connected by shared product, vendor, weakness, or advisory.
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