CVE-2026-40394 — Denial of Service
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CVE-2026-40394 — Varnish Cache 9 before 9.0.1 and Varnish Enterprise before 6.0.16r11 allows a "workspace overflow" denial of service (daemon panic) for certain amounts of prefetched data. The setup of an HTTP/2 session starts with a speculative HTTP/1 transport, and upon upgrading to h2 the HTTP/1
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-40394 | vulnerability | CVE-2026-40394 |
| CWE-670 | weakness | CWE-670 |
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 12, 2026 at 23:16 UTC |
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