{"id":"CVE-2026-17552","summary":"Plack::App::Prerender versions before 0.3.0 for Perl can proxy to an arbitrary host via unvalidated REQUEST_URI concatenation in call","details":"Plack::App::Prerender versions before 0.3.0 for Perl can proxy to an arbitrary host via unvalidated REQUEST_URI concatenation in call.\n\nWhen 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 ('/').\n\nWhen 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.\n\nFor 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.\n\nThis allows an attacker to access internal or restricted hosts that only the webserver has access to.","aliases":["GHSA-6x4w-x68j-ppqq"],"modified":"2026-07-29T03:46:03.841189540Z","published":"2026-07-27T18:04:47.993Z","database_specific":{"cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17552.json","cna_assigner":"CPANSec"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/07/28/3"},{"type":"WEB","url":"https://cpan.org/modules"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17552.json"},{"type":"ADVISORY","url":"https://github.com/robrwo/perl-Plack-App-Prerender/security/advisories/GHSA-6x4w-x68j-ppqq"},{"type":"ADVISORY","url":"https://metacpan.org/release/RRWO/Plack-App-Prerender-v0.3.0/changes"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17552"},{"type":"FIX","url":"https://github.com/robrwo/perl-Plack-App-Prerender/commit/2d793dd69e2b6f4e469618ee742bd8402677202d.patch"},{"type":"PACKAGE","url":"https://github.com/robrwo/perl-Plack-App-Prerender"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/robrwo/perl-plack-app-prerender","events":[{"introduced":"0"},{"fixed":"b051c0c43fb34fd298fd3c2a0f398a0f60a1bde0"},{"fixed":"2d793dd69e2b6f4e469618ee742bd8402677202d"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.3.0"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v0.2.0","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-17552.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}