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Apache Tomcat DoS with unexpected TLS packet

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2021-41079

Published

Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.

Source published
16 Sep 2021 14:40:25 UTC
Source modified
8 Oct 2026 21:13:52 UTC
Observed here
23 Oct 2026 15:48:27 UTC
Source terms
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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

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Sources read 10 Nov 15:49 UTC · 275 of 275 readable · 274 fully read · documentation 469/469 current