CVE-2026-41878: Insecure Direct Object Reference in R-SOFT DMS

Severity: high (CVSS 7.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-10 · updated 2026-10-25
Weakness: CWE-639

Description

R-SOFT DMS is vulnerable to Insecure Direct Object Reference (IDOR) attack in multiple file download endpoints. The application fetches files from the database by ID and serves them to whoever requests them, relying only on session authentication, meaning any valid user can access any file. This issue was fixed in version v3.19-2862 and v3.17-2580.

Affected products

R-SOFT SERWIS DMS: before v3.19-2862; before v3.17-2580 — fixed in v3.17-2580, v3.19-2862

How to fix

Upgrade to a fixed version: R-SOFT SERWIS DMS v3.17-2580, v3.19-2862. Check the vendor advisory for mitigations.

References

https://cert.pl/posts/2026/07/CVE-2026-41876

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