Vulnerability · Published Jul 28, 2026 · Assigned by redhat

CVE-2026-18047Dogtag-pki: pki-core: redhat-pki: pki: acme admin enable/disable endpoint authentication bypass via trailing slash

Medium 6.5

In plain English

A medium-severity authentication bypass in Red Hat Certificate System 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 57.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Red Hat	Red Hat Certificate System 10	see references
Red Hat	Red Hat Certificate System 11	see references
Red Hat	Red Hat Certificate System 9	see references
Red Hat	Red Hat Certificate System 9	see references
Red Hat	Red Hat Enterprise Linux 10	see references
Red Hat	Red Hat Enterprise Linux 6	see references
Red Hat	Red Hat Enterprise Linux 7	see references
Red Hat	Red Hat Enterprise Linux 8	see references
Red Hat	Red Hat Enterprise Linux 9	see references

Weakness: CWE-288 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References

https://access.redhat.com/security/cve/CVE-2026-18047 vdb-entry, x_refsource_REDHAT
RHBZ#2507956 issue-tracking, x_refsource_REDHAT