CVE-2026-34586 PdfDing: Shared PDF Expiration, Max Views, and Deletion Bypass via Serve/Download Endpoints
Attackers can access expired, view-limited, or deleted shared PDFs because the application fails to validate these states during download requests.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34586?
CVE-2026-34586 is a medium-severity missing authorization vulnerability in mrmn2 PdfDing, published on 31 Mar 2026. Any signed-in user can exploit it over the network, 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 1.7.1, check_shared_access_allowed() validates only session existence — it does not check SharedPdf.inactive (expiration / max views) or SharedPdf.deleted. The Serve and Download endpoints rely solely on this function, allowing previously-authorized users to access shared PDF content after expiration, view limit, or soft-deletion. This issue has been patched in version 1.7.1.
Weakness: CWE-863
Which versions are affected by CVE-2026-34586?
It affects 1 product.
Products include Pdfding Pdfding.
How do I fix CVE-2026-34586?
No fix has been published for CVE-2026-34586 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-2026-34586 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34586 exists.
Other vulnerabilities in mrmn2 PdfDing
Sources
Also known as GHSA-vfqx-2464-38wf.