CVE-2026-12353

RHCS: Memory Leak During HTTPS Connection Leads to Denial of Service

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Severity

Moderate

Red Hat Product Security

5.3

CVSS 3.1

Review impact separately from score.

Published · June 15, 2026

Updated · July 24, 2026

Description

An unauthenticated attacker could trigger an Out of Memory condition to crash the Java process for RHCS by repeatedly sending HTTP requests to the TLS endpoint. Depending on how the RHCS server is configured, a manual intervention to restart it may prove necessary.

Statement

An unauthenticated attacker can trigger memory exhaustion in the Red Hat Certificate System Java process by repeatedly sending HTTP requests to its TLS endpoint. Over time, this causes an Out of Memory condition that crashes the service. Depending on the server configuration, manual intervention may be required to restart the affected RHCS instance.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE-772 · Missing Release of Resource after Effective Lifetime