CVE-2026-57957 Papermark 0.22.0 - CORS Misconfiguration in Viewer Upload Endpoint

Papermark through 0.22.0 contains a cross-origin resource sharing CORS misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cross-origin requests by exploiting the TUS-based viewer upload endpoint reflecting arbitrary request Origins with...

CVE-2026-57957

Summary (CVE-2026-57957): Papermark up to version 0.22.0 has a CORS misconfiguration in the TUS-based viewer upload endpoint. This flaw reflects arbitrary request Origins with Access-Control-Allow-Credentials set to true, enabling unauthenticated remote attackers to perform credentialed cross-ori...

CVE-2026-57957: Permissive Cross-domain Policy with Untrusted Domains

Papermark through 0.22.0 contains a cross-origin resource sharing CORS misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cross-origin requests by exploiting the TUS-based viewer upload endpoint reflecting arbitrary request Origins with...