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CVE-2025-47905

Quick assessment

Affected
varnish-software Varnish 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。 Varnish Cache 7.6.3之前版本和7.7至7.7.1之前版本和Varnish Enterprise 6.0.13r14之前版本存在安全漏洞，该漏洞源于HTTP/1请求中允许跳过CRLF来分隔块边界，可能导致客户端解同步攻击。

CVSS 5.4 · Medium EPSS 0.36% · P28
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I. Basic Information for CVE-2025-47905

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Varnish Cache before 7.6.3 and 7.7 before 7.7.1, and Varnish Enterprise before 6.0.13r14, allow client-side desync via HTTP/1 requests, because the product incorrectly permits CRLF to be skipped to delimit chunk boundaries.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
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 安全漏洞
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。 Varnish Cache 7.6.3之前版本和7.7至7.7.1之前版本和Varnish Enterprise 6.0.13r14之前版本存在安全漏洞，该漏洞源于HTTP/1请求中允许跳过CRLF来分隔块边界，可能导致客户端解同步攻击。
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
varnish-software Varnish Cache 0 ~ 6.0.14 LTS -

II. Public POCs for CVE-2025-47905

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III. Intelligence Information for CVE-2025-47905

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Vendor Advisories for CVE-2025-47905 (1)

IV. Related Vulnerabilities

Same product: Varnish Cache
Same vendor: varnish-software
Same weakness: CWE-444

V. Comments for CVE-2025-47905

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