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A flaw was found in JSS, where it did not properly free up all memory. Over time, the wasted memory builds up in the server memory, saturating the server’s RAM. This flaw allows an attacker to force the invocation of an out-of-memory process, causing a denial of service.
Use CWE-401, Dogtagpki vendor hub and Network Security Services For Java product page to widen CVE-2021-4213 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2022-4132 for nearby disclosures in the same product family. Additional editorial context is available in Cybersecurity Weekly Roundup: April 27, 2026 — Critical Zero-Days and Framework Failures.