Vulnerability · Published Sep 1, 2026 · Assigned by redhat

CVE-2026-11873Pki-core: dogtag-pki: empty request to dogtag /ca/rest/certrequests causes http 500, java exception, and stacktrace disclosure

Medium 6.5

In plain English

A medium-severity security flaw in Red Hat Certificate System 9 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 40% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 60.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

An Apache-proxied Dogtag CA REST endpoint exposed by IdM (POST /ca/rest/certrequests) returns HTTP 500 with internal Java stack traces for unauthenticated malformed requests. The same unauthenticated error path emits large multi-line stack traces into the CA debug log, creating a log-amplification resource exhaustion vector (disk growth and I/O contention) without requiring authentication.

Affected products (as reported)

Vendor	Product	Versions
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-209 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

References

https://access.redhat.com/security/cve/CVE-2026-11873 vdb-entry, x_refsource_REDHAT
RHBZ#2487505 issue-tracking, x_refsource_REDHAT