CVE-2026-40396 — Denial of Service
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CVE-2026-40396 — Varnish Cache 9 before 9.0.1 allows a "workspace overflow" denial of service (daemon panic) after timeout_linger. A malicious client could send an HTTP/1 request, wait long enough until the session releases its worker thread (timeout_linger) and resume traffic before the session is
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-40396 | vulnerability | CVE-2026-40396 |
| 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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