High [CVE-2026-93563] Unbounded multi-line response accumulation in SmtpResponseDecoder leads to memory-exhaustion DoS
This high-severity Red Hat Linux advisory covers CVE-2026-93563; related products: Red Hat build of Apache Camel for Spring Boot 4, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7.
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Summary
Unbounded multi-line response accumulation in SmtpResponseDecoder leads to memory-exhaustion DoS. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-1035.
Affected products named by the advisory: Red Hat build of Apache Camel for Spring Boot 4; Red Hat Fuse 7; Red Hat JBoss Enterprise Application Platform 7; Red Hat Single Sign-On 7.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
Mitigation checklist
- See https://github.com/netty/netty/security/advisories/GHSA-pq4x-537v-r54q for fixed versions and remediation guidance.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
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