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CVE-2026-17552: Plack::App::Prerender 0 to before 0.3.0
CVE-2026-17552. CVSS 3.1 base score 9.1 (CRITICAL, Source advisory). EPSS 0.00538 (percentile 0.44525), scored 22-Oct-2026.
Affected technology
Plack::App::Prerender · 0 to before 0.3.0
RRWO
Description’s affected range: versions before 0.3.0 for Perl can proxy to an arbitrary host via unvalidated REQUEST_URI concatenation in call
Component: Not specified by the source
Function: Plack::App::Prerender::call
File: lib/Plack/App/Prerender.pm
Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
The source says 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. Source advisory’s CVSS 3.1 assessment (base score 9.1/10) rates confidentiality and integrity impact as high; availability impact as none.
- CWE
- CWE-918
- CCR priority
- 36.5 /100 (P4)
- CVSS 3.1
- 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · Source advisory
- EPSS
- 0.00538 · percentile 0.44584 · 2026-10-24
- KEV
- no
Provenance
- FIRST EPSS daily exploit-probability · Source record · observed 2026-10-24 15:09:16.138216+00:00 UTC
- NVD CVE API 2.0 · Source record · observed 2026-10-24 15:07:27.951960+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-17552.html