EUVD-2026-49394Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Primary rating from Vendor (9b29abf9-4ab0-4765-b253-1875cd9b441e) · only source for this CVE.
CVSS VectorVendor: 9b29abf9-4ab0-4765-b253-1875cd9b441e
Lifecycle Timeline
5DescriptionCVE.org
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.
AnalysisAI
Server-side request forgery in Plack::App::Prerender before 0.3.0 allows unauthenticated remote attackers to proxy requests to arbitrary internal hosts by crafting a request URI starting with '@'. The application appends the raw REQUEST_URI to a plain string rewrite base without validating the path, enabling an attacker to change the destination authority and access restricted resources. No public exploit is known, and active exploitation has not been observed.
Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
Leaving vuln.today