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CVE-2026-50052

Quick assessment

Affected
The Vinyl Cache Project Vinyl Cache
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Varnish Cache是Varnish公司的一套反向网站缓存服务器。Vinyl Cache是Vinyl Cache公司的一个高性能HTTP反向代理与Web应用缓存加速平台。 Vinyl Cache 9.0.1之前版本和Varnish Cache 9.0.3之前版本存在环境问题漏洞，该漏洞源于HTTP/2请求解析缺陷，可能导致后端请求反序列化攻击。

AI Predicted 7.5 Difficulty: Easy EPSS 0.38% · P32

Affected Version Matrix 8

VendorProduct Version RangeStatus
The Vinyl Cache Project Varnish Cache (pre split) 7.6.0≤ 8.0.1 affected
8.0.2 unaffected
6.0.14≤ 6.0.17 affected
6.0.18 unaffected
The Vinyl Cache Project Vinyl Cache 9.0.0 affected
9.0.1 unaffected
Varnish Software Varnish Cache by Varnish Software 9.0.0≤ 9.0.2 affected
9.0.3 unaffected
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I. Basic Information for CVE-2026-50052

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
Varnish Cache和Vinyl Cache 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Varnish Cache是Varnish公司的一套反向网站缓存服务器。Vinyl Cache是Vinyl Cache公司的一个高性能HTTP反向代理与Web应用缓存加速平台。 Vinyl Cache 9.0.1之前版本和Varnish Cache 9.0.3之前版本存在环境问题漏洞，该漏洞源于HTTP/2请求解析缺陷，可能导致后端请求反序列化攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
The Vinyl Cache Project Vinyl Cache 9.0.0 -
The Vinyl Cache Project Varnish Cache (pre split) 7.6.0 ~ 8.0.1 -
Varnish Software Varnish Cache by Varnish Software 9.0.0 ~ 9.0.2 -

II. Public POCs for CVE-2026-50052

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III. Intelligence Information for CVE-2026-50052

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News Coverage for CVE-2026-50052 (1)

IV. Related Vulnerabilities

Same product: Vinyl Cache
Same weakness: CWE-444