Auth bypass in KDE Arianna

CVE-2026-42095

bookserver in KDE Arianna before 26.04.1 allows attackers to read files over a socket connection by guessing a URL.

Vulnerability class: Broken Authentication

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-42095: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-42095?
CVE-2026-42095 is a medium-severity vulnerability in KDE Arianna, classified under Missing Authentication for Critical Function. CVSS score: 4.0/10. Published 2026-04-24.
How severe is CVE-2026-42095?
Medium severity. CVSS v3 base score is 4.0 out of 10.