What is CVE-2026-14456?

CVE-2026-14456 is a high-severity vulnerability in Openssl, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-08-13.

How severe is CVE-2026-14456?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Openssl

CVE-2026-14456

Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes valid QUIC Initial packets for unknown destination connection IDs, it can allocate and queue new incoming channels without enforcing any limit. Impact summary: A r…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openssl — versions 4.0.0, 3.6.0, 3.5.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

openssl-security@openssl.org (vendor-advisory)
openssl-security@openssl.org (patch)
openssl-security@openssl.org (patch)
openssl-security@openssl.org (patch)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-14456?: CVE-2026-14456 is a high-severity vulnerability in Openssl, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-08-13.
How severe is CVE-2026-14456?: High severity. CVSS v3 base score is 7.5 out of 10.