{"id":"CVE-2026-86256","aliases":["GHSA-vqv8-j3mj-wjxj"],"url":"https://o3.security/vulnerability/CVE-2026-86256","summary":"wger before 2.6 Open Redirect via trainer-login next parameter","details":"wger before 2.6 (affected versions <= 2.5.0) contains an open redirect vulnerability in the trainer_login view (wger/core/views/user.py). After a trainer enters impersonation mode, the view redirects to the user-supplied 'next' GET parameter via HttpResponseRedirect() without validating it with url_has_allowed_host_and_scheme(). An attacker who delivers a crafted link to an authenticated trainer can redirect the trainer's browser to an attacker-controlled domain, enabling phishing and leaking the wger URL structure (including the impersonated user's user_pk) via the Referer header.","published":"2026-09-06T12:00:30.256Z","modified":"2026-09-11T03:30:48.945075562Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"wger","fixedVersion":"2.6"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86256.json"},{"type":"ADVISORY","url":"https://github.com/wger-project/wger/security/advisories/GHSA-vqv8-j3mj-wjxj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86256"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/wger-before-2.6-open-redirect-via-trainer-login-next-parameter"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-11T03:30:48.945075562Z"}}