{"schemaVersion":3,"id":"CVE-2026-67354","aliases":["UBUNTU-CVE-2026-67354","DEBIAN-CVE-2026-67354","CGA-2697-fwm3-6248","CGA-grcv-ch7x-g7gm","CGA-jpgv-5jhm-c96c","CGA-xxpr-6q9g-jc6g","CGA-589x-5vrq-qw6h","CGA-7vgf-chvr-w4g6","CGA-f9mp-q33j-jwhj","CGA-h9r3-f8xr-qg4j","CGA-jv8x-gf7f-6p48","CGA-qq3p-ccxg-v5w5","CGA-vvr9-7h76-65f6","CGA-xc2w-76j8-8v6j"],"status":"published","duplicateOf":null,"title":null,"description":"guzzlehttp/guzzle versions before 7.15.1 contain an information disclosure vulnerability in RedirectMiddleware. When the optional allow_redirects.referer setting is enabled, the middleware copies the URI fragment (the portion after '#') from the referring request into the generated Referer header when following a same-scheme redirect (e.g., HTTPS to HTTPS). An attacker who controls the redirect destination can read this fragment from the incoming Referer header, potentially disclosing one-time login secrets, access tokens, state values, or other sensitive client data to a server never meant to receive it. The referer setting is disabled by default. Fixed in 7.15.1, which strips the fragment before generating the Referer value.","dates":{"published":"2026-08-01T12:22:18.324Z","modified":"2026-10-08T15:24:16.125Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.2,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":8.2,"severity":"high","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · 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