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CVE-2026-17552— Plack::App::Prerender versions before 0.3.0 for Perl can proxy to an arbitrary host via unvalidated REQUEST_URI concatenation in call

Quick assessment

Affected
RRWO Plack::App::Prerender
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.

RRWO Plack::App::Prerender是RRWO个人开发者的一个Web应用预渲染组件。 RRWO Plack::App::Prerender 0.3.0之前版本存在服务端请求伪造漏洞，该漏洞源于未验证REQUEST_URI的拼接，可代理到任意主机，导致攻击者访问内部或受限主机。

AI Predicted 9.1 Difficulty: Easy EPSS 0.54% · P43

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
RRWO Plack::App::Prerender < 0.3.0 affected
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I. Basic Information for CVE-2026-17552

Vulnerability Information
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Vulnerability Title
Plack::App::Prerender versions before 0.3.0 for Perl can proxy to an arbitrary host via unvalidated REQUEST_URI concatenation in call
Source: CVE Program / CVE List V5
Vulnerability Description
Plack::App::Prerender versions before 0.3.0 for Perl can proxy to an arbitrary host via unvalidated REQUEST_URI concatenation in call. When the rewrite base is a plain string, the REQUEST_URI is appended to it, with no check that the path starts with a forward slash ('/'). When the rewrite base does not contain a path (which is the standard given in the SYNOPSIS), an attacker can create a request that changes the hostname. A request target starting with an at-sign ('@') changes the base to a RFC 3986 userinfo component. For example, a rewrite base of "https://example.com" with the submitted request "GET @192.168.1.2/" will send a request to "https://example.com@192.168.1.2/", with the rendered content returned to the attacker. This allows an attacker to access internal or restricted hosts that only the webserver has access to.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
RRWO Plack::App::Prerender 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RRWO Plack::App::Prerender是RRWO个人开发者的一个Web应用预渲染组件。 RRWO Plack::App::Prerender 0.3.0之前版本存在服务端请求伪造漏洞，该漏洞源于未验证REQUEST_URI的拼接，可代理到任意主机，导致攻击者访问内部或受限主机。
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
RRWO Plack::App::Prerender 0 ~ 0.3.0 -

II. Public POCs for CVE-2026-17552

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III. Intelligence Information for CVE-2026-17552

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Patches & Fixes for CVE-2026-17552 (1)

Vendor Advisories for CVE-2026-17552 (1)

Vendor Pages for CVE-2026-17552 (1)

IV. Related Vulnerabilities

Same vendor: RRWO
Same weakness: CWE-918

V. Comments for CVE-2026-17552

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