CVE-2026-34376 PdfDing: Password-protected share bypass via direct serve endpoint
Unauthenticated attackers can bypass password protection on shared PDFs by directly accessing the file-serving endpoint, exposing confidential documents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34376?
CVE-2026-34376 is a high-severity missing authorization vulnerability in mrmn2 PdfDing, published on 1 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-34376?
It affects 1 product.
Products include Pdfding Pdfding.
How do I fix CVE-2026-34376?
No fix has been published for CVE-2026-34376 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-34376 being exploited?
There is no known exploitation of CVE-2026-34376 in the wild and no public exploit code.
Other vulnerabilities in mrmn2 PdfDing
Sources
Also known as GHSA-42x7-vvj4-4cj3.