What is CVE-2026-12353?

CVE-2026-12353 is a medium-severity vulnerability in Red Hat Certificate System 9, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 5.3/10. Published 2026-07-23.

How severe is CVE-2026-12353?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Red Hat Certificate System 9

CVE-2026-12353

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 resta…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Red Hat Certificate System 9
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Weakness classification (CWE)

CWE-772 — Missing Release of Resource after Effective Lifetime

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-12353?: CVE-2026-12353 is a medium-severity vulnerability in Red Hat Certificate System 9, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 5.3/10. Published 2026-07-23.
How severe is CVE-2026-12353?: Medium severity. CVSS v3 base score is 5.3 out of 10.