What’s Vulnerable › Vulnerabilities

CVE-2026-34376: PdfDing: Password-protected share bypass via direct serve endpoint

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-01 · updated 2026-10-26
• Weakness: CWE-863

Description

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.

Affected products

• mrmn2 PdfDing: before 1.7.0 — fixed in 1.7.0

How to fix

Upgrade to a fixed version: mrmn2 PdfDing 1.7.0. Check the vendor advisory for mitigations.

References

• https://github.com/mrmn2/PdfDing/commit/ae579ea98c5603d1435e0d90e81d72151564088a
• https://github.com/mrmn2/PdfDing/pull/294
• https://github.com/mrmn2/PdfDing/releases/tag/v1.7.0
• https://github.com/mrmn2/PdfDing/security/advisories/GHSA-42x7-vvj4-4cj3

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