Summaryinfo

A vulnerability, which was classified as problematic, has been found in mrmn2 PdfDing up to 1.6.x. This affects an unknown function. Performing a manipulation results in authorization. This vulnerability is reported as CVE-2026-34376. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in mrmn2 PdfDing up to 1.6.x. This affects an unknown functionality. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. This is going to have an impact on confidentiality. The summary by CVE is:

PdfDing is a selfhosted PDF manager, viewer and editor offering a seamless user experience on multiple devices. Prior to version 1.7.0, an access-control vulnerability allows unauthenticated users to retrieve password-protected shared PDFs by directly calling the file-serving endpoint without completing the password verification flow. This results in unauthorized access to confidential documents that users expected to be protected by a shared-link password. This issue has been patched in version 1.7.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-34376 since 03/27/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.7.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch ae579ea98c5603d1435e0d90e81d72151564088a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• mrmn2

Name

• PdfDing

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6

License

• open-source

Website

• Product: https://github.com/mrmn2/PdfDing/

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