Auth bypass in Mrmn2 Pdfding
CVE-2026-34376
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.
Vulnerability class: Broken Access Control
EPSS: 0.004 (29.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Mrmn2 Pdfding — versions < 1.7.0
- Pdfding
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-34376?
- CVE-2026-34376 is a high-severity vulnerability in Mrmn2 Pdfding, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-04-01.
- How severe is CVE-2026-34376?
- High severity. CVSS v3 base score is 7.5 out of 10.