{"identifier":"CVE-2026-75628","cve":{"id":"CVE-2026-75628","description":"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.","published":"2026-08-20T01:16:53.803000+00:00","modified":"2026-10-27T10:10:00.240000+00:00","status":"Deferred","score":5.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","cvss_version":"3.1","affected":[],"weaknesses":["CWE-601"],"references":[{"url":"https://datatracker.ietf.org/doc/html/rfc9700#section-4.11.1","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/LNATION/Punk-OAuth2-0.02/source/include/pox/pox_util.h#L94","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/LNATION/Punk-OAuth2-0.03/changes","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://url.spec.whatwg.org/#concept-basic-url-parser","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://url.spec.whatwg.org/#relative-slash-state","source":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"http://www.openwall.com/lists/oss-security/2026/08/20/1","source":"af854a3a-2127-422b-91ae-364da2661108"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","baseScore":5.7,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.1,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-28T15:11:05.001417Z","id":"CVE-2026-75628","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-28T10:25:56.818617+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00503,"percentile":0.42809,"date":"2026-10-27","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"datatracker.ietf.org","source_url":"https://datatracker.ietf.org/doc/html/rfc9700#section-4.11.1","investigate_url":"https://investigate.aeglixmind.com/#datatracker.ietf.org"},{"domain":"metacpan.org","source_url":"https://metacpan.org/release/LNATION/Punk-OAuth2-0.02/source/include/pox/pox_util.h#L94","investigate_url":"https://investigate.aeglixmind.com/#metacpan.org"},{"domain":"url.spec.whatwg.org","source_url":"https://url.spec.whatwg.org/#concept-basic-url-parser","investigate_url":"https://investigate.aeglixmind.com/#url.spec.whatwg.org"},{"domain":"www.openwall.com","source_url":"http://www.openwall.com/lists/oss-security/2026/08/20/1","investigate_url":"https://investigate.aeglixmind.com/#www.openwall.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2026-75628","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2026-75628","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2026-75628","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}