CVE-2026-57957

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 Access-Control-Allow-Credentials set to true. Attackers can lure authenticated victims to malicious pages that silently issue credentialed cross-origin requests to upload arbitrary files into victim datarooms and read credentialed responses.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/AstoKr/papermark/pull/1
https://github.com/papermark/papermark/issues/2178
https://www.vulncheck.com/advisories/papermark-cors-misconfiguration-in-viewer-upload-endpoint

Configurations

No configuration.

History

29 Jun 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-29 18:16

Updated : 2026-07-14 22:17

NVD link : CVE-2026-57957

Mitre link : CVE-2026-57957

CVE.ORG link : CVE-2026-57957

JSON object : View

Products Affected

No product.

CWE

CWE-942

Permissive Cross-domain Policy with Untrusted Domains

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