Description
In Vinyl Cache before 9.0.1 and Varnish Cache before 9.0.3, a deficiency in HTTP/2 request parsing can be exploited to launch a backend request desync attack (request smuggling), which in turn can be used for cache poisoning, authentication bypass, or possibly even information disclosure and manipulation. The attack vector only exists if HTTP/2 support is enabled by setting the feature parameter to contain +http2. HTTP/2 support is disabled by default.
Details
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/S:N/AU:N/R:A/V:D/RE:L/U:Green
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| varnish | — | — |
References
Similar Threats
- Unknown ALPINE-CVE-2025-8671
- Unknown ALSA-2025:8336
- Unknown ALSA-2025:8337
- Unknown ALPINE-CVE-2025-47905
- Unknown ALPINE-CVE-2025-30346
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