{"id":"CVE-2026-67354","revision":"abc9781691ca4e01bfc103b49c95211e","records":[{"revision":"abc9781691ca4e01bfc103b49c95211e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-67354","aliases":[],"title":"guzzlehttp/guzzle before 7.15.1 URI Fragment Disclosure via Referer","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.","state":0,"publishedAt":"2026-08-01T12:22:18.324+00:00","modifiedAt":"2026-10-08T15:24:16.125+00:00","affected":[{"ecosystem":"Vendor product","name":"guzzle","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"guzzle\",\n                    \"product\": \"guzzle\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"7.15.1\"\n                        },\n                        {\n                            \"version\": \"7.15.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:composer/guzzlehttp/guzzle\"\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":8.2,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/guzzle/guzzle/security/advisories/GHSA-h95v-h523-3mw8","https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-uri-fragment-disclosure-via-referer"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-67354","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-67354","identifiers":["CVE-2026-67354"]},"retained":false,"historicalAffected":[]}],"coverage":[]}