Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M

CVE-2026-34586PdfDing: Shared PDF Expiration, Max Views, and Deletion Bypass via Serve/Download Endpoints

Medium 6.5

In plain English

A medium-severity incorrect authorization in PdfDing from mrmn2. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 77.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
mrmn2	PdfDing	< 1.7.1

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/mrmn2/PdfDing/security/advisories/GHSA-vfqx-2464-38wf x_refsource_CONFIRM
https://github.com/mrmn2/PdfDing/commit/a6783b259b25c839c52c6f2380333827a52e89eb x_refsource_MISC
https://github.com/mrmn2/PdfDing/releases/tag/v1.7.1 x_refsource_MISC