{"id":"CVE-2026-18047","title":"Dogtag-pki: pki-core: redhat-pki: pki: acme admin enable/disable endpoint authentication bypass via trailing slash","summary":"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 bypa…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","cvssSource":"cna","cwe":["CWE-288"],"vendor":"Red Hat","product":"redhat-pki:10/redhat-pki","affected":["redhat-pki:10/redhat-pki (all versions)","redhat-pki (all versions)","pki-core","redhat-pki","dogtag-pki (all versions)","pki-core","pki-core (all versions)","pki-core:10.6/pki-core (all versions)","pki-core (all versions)"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-07-28T13:26:20.679235Z"},"published":"2026-07-28","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:25:04.849Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-18047","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-18047"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507956","label":"RHBZ#2507956"}],"tags":["cve.org"],"epss":0.00492,"epssPercentile":0.42404,"ingestedAt":"2026-11-05T22:38:31.537Z","slug":"CVE-2026-18047","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `redhat-pki:10/redhat-pki (all versions)`\n- `redhat-pki (all versions)`\n- `pki-core`\n- `redhat-pki`\n- `dogtag-pki (all versions)`\n- `pki-core`\n- `pki-core (all versions)`\n- `pki-core:10.6/pki-core (all versions)`\n- `pki-core (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nTo mitigate this vulnerability, change the URL patterns in the ACME responder's web.xml from exact-match to prefix-match.\nEdit the file /usr/share/pki/acme/webapps/acme/WEB-INF/web.xml and replace the url-pattern entries for the enable and disable endpoints:\n\n<url-pattern>/enable</url-pattern>  ->  <url-pattern>/enable/*</url-pattern>\n<url-pattern>/disable</url-pattern> ->  <url-pattern>/disable/*</url-pattern>\n\nThen restart the PKI server for the changes to take effect.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}