{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75628","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","state":"PUBLISHED","assignerShortName":"CPANSec","dateReserved":"2026-08-18T01:18:00.649Z","datePublished":"2026-08-20T00:40:08.220Z","dateUpdated":"2026-10-19T21:19:28.700Z"},"containers":{"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","modules":["Punk::OAuth2"],"packageName":"Punk-OAuth2","packageURL":"pkg:cpan/Punk-OAuth2","programFiles":["include/pox/pox_util.h","lib/Punk/Plugin/OAuth2.pm"],"programRoutines":[{"name":"Punk::OAuth2::same_origin_path"}],"versions":[{"lessThan":"0.03","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"Punk::OAuth2 versions before 0.03 for Perl allow an attacker-chosen off-site redirect after login because same_origin_path accepts a backslash or tab in the return parameter.\n\noauth2_login reads the return parameter from the initiation request, runs same_origin_path over it, and stores the survivor in the session flow record as the post-login redirect target. That check rejects a value that does not begin with a slash, one with a slash as its second byte, and one containing CR or LF. A backslash and a tab pass. The URL Standard treats a backslash as equivalent to a slash for special schemes, so `/\\evil.example` parses with the authority `evil.example`. It also strips ASCII tab before parsing, so a tab between two leading slashes leaves `//evil.example`.\n\nA crafted link to the application's own login route lands the victim on the attacker's site after a genuine authentication. The redirect carries no authorization code or access token."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","description":"CWE-601 URL Redirection to Untrusted Site ('Open Redirect')","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","shortName":"CPANSec","dateUpdated":"2026-08-20T00:40:08.220Z"},"references":[{"tags":["release-notes"],"url":"https://metacpan.org/release/LNATION/Punk-OAuth2-0.03/changes"},{"tags":["technical-description"],"url":"https://metacpan.org/release/LNATION/Punk-OAuth2-0.02/source/include/pox/pox_util.h#L94"},{"tags":["technical-description"],"url":"https://datatracker.ietf.org/doc/html/rfc9700#section-4.11.1"},{"tags":["technical-description"],"url":"https://url.spec.whatwg.org/#relative-slash-state"},{"tags":["technical-description"],"url":"https://url.spec.whatwg.org/#concept-basic-url-parser"}],"solutions":[{"lang":"en","value":"Upgrade to Punk-OAuth2 0.03 or later."}],"source":{"discovery":"UNKNOWN"},"title":"Punk::OAuth2 versions before 0.03 for Perl allow an attacker-chosen off-site redirect after login because same_origin_path accepts a backslash or tab in the return parameter","workarounds":[{"lang":"en","value":"For deployments that cannot upgrade to 0.03, strip the return query parameter from requests to the oauth2_login initiation route at the reverse proxy. Logins then use the configured redirect_ok destination."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/08/20/1"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-08-20T02:25:36.019Z"}},{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.7,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","integrityImpact":"NONE","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2026-75628","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-08-28T15:11:05.001417Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-601","description":"CWE-601 URL Redirection to Untrusted Site ('Open Redirect')"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-19T21:19:28.700Z"}}]}}